Device Notifier Gets Confused

Clicking unmount in Device Nofifier resulted in annoying action and freezing of plasma:

Jun 26 07:26:45 udisksd[1226]: Cleaning up mount point /GARMIN (device 8:48 is not mounted)
Jun 26 07:26:45 systemd[976]: GARMIN.mount: Succeeded.
Jun 26 07:26:45 systemd[1]: GARMIN.mount: Succeeded.
Jun 26 07:26:45 udisksd[1226]: Unmounted /dev/sdd on behalf of uid 1000
Jun 26 07:26:45 kernel: sd 6:0:0:0: [sdd] Spinning up disk...
Jun 26 07:26:46 udisksd[1226]: Cleaning up mount point /GARMIN-KART (device 8:65 is not mounted)
Jun 26 07:26:46 systemd[976]: GARMIN\x2dKART.mount: Succeeded.
Jun 26 07:26:46 udisksd[1226]: Unmounted /dev/sde1 on behalf of uid 1000
Jun 26 07:26:46 systemd[1]: GARMIN\x2dKART.mount: Succeeded.
Jun 26 07:27:11 plasmashell[1141]: org.kde.solid.udisks2: Error getting props: "org.freedesktop.DBus.Error.NoReply" "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken."
Jun 26 07:27:26 org_kde_powerdevil[1244]: powerdevil: ACTIVE SESSION PATH CHANGED: "/"
Jun 26 07:27:26 org_kde_powerdevil[1244]: powerdevil: Switched to inactive session - leaving unchanged
Jun 26 07:27:28 org_kde_powerdevil[1244]: powerdevil: ACTIVE SESSION PATH CHANGED: "/org/freedesktop/login1/session/_31"
Jun 26 07:27:28 org_kde_powerdevil[1244]: powerdevil: Current session is now active
Jun 26 07:27:28 kcminit[3350]: Initializing  "kcm_mouse" :  "kcminit_mouse"
Jun 26 07:27:28 kwin_x11[1097]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 17810, resource id: 134217733, major code: 18 (ChangeProperty), minor code: 0
Jun 26 07:27:36 plasmashell[1141]: org.kde.solid.udisks2: Error getting props: "org.freedesktop.DBus.Error.NoReply" "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken."
Jun 26 07:28:01 plasmashell[1141]: org.kde.solid.udisks2: Error getting props: "org.freedesktop.DBus.Error.NoReply" "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken."
Jun 26 07:28:01 plasmashell[1141]: file:///usr/lib64/qt5/qml/org/kde/plasma/components/Highlight.qml:47:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
Jun 26 07:28:01 plasmashell[1141]: file:///usr/lib64/qt5/qml/org/kde/plasma/components/Highlight.qml:47:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
Jun 26 07:28:10 plasmashell[1141]: trying to show an empty dialog
Jun 26 07:28:10 plasmashell[1141]: file:///usr/lib64/qt5/qml/org/kde/plasma/components/Highlight.qml:47:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
Jun 26 07:28:25 kernel: ..................................................................................................not responding...
Jun 26 07:28:25 kernel: sd 6:0:0:0: [sdd] Read Capacity(10) failed: Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jun 26 07:28:25 kernel: sd 6:0:0:0: [sdd] Sense Key : Not Ready [current] 
Jun 26 07:28:25 kernel: sd 6:0:0:0: [sdd] Add. Sense: Logical unit is in process of becoming ready
Jun 26 07:28:25 kernel: sd 6:0:0:0: [sdd] 0 512-byte logical blocks: (0 B/0 B)
Jun 26 07:28:25 kernel: sdd: detected capacity change from 3959422976 to 0
Jun 26 07:28:25 kernel: sd 6:0:0:0: [sdd] Spinning up disk...
Jun 26 07:28:42 kernel: ................
Jun 26 07:28:42 kernel: usb 2-9: USB disconnect, device number 6
Jun 26 07:28:42 kernel: sd 6:0:0:0: [sdd] Synchronizing SCSI cache
Jun 26 07:28:42 kernel: sd 6:0:0:0: [sdd] Synchronize Cache(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Jun 26 07:28:42 kernel: sd 6:0:0:1: [sde] Synchronizing SCSI cache
Jun 26 07:28:42 kernel: sd 6:0:0:1: [sde] Synchronize Cache(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Jun 26 07:28:43 kernel: .ready
Jun 26 07:28:43 kernel: scsi 6:0:0:0: [sdd] Read Capacity(10) failed: Result: hostbyte=DID_OK driverbyte=DRIVER_ERROR
Jun 26 07:28:43 kernel: scsi 6:0:0:0: [sdd] Sense not available.
Jun 26 07:28:43 multipath[3482]: sysfs_is_multipathed: error scanning /sys/block/sdd/holders
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:174:13: QML Binding: Not restoring previous value because restoreMode has not been set.
                                   This behavior is deprecated.
                                   You have to import QtQml 2.15 after any QtQuick imports and set
                                   the restoreMode of the binding to fix this warning.
                                   In Qt < 6.0 the default is Binding.RestoreBinding.
                                   In Qt >= 6.0 the default is Binding.RestoreBindingOrValue.
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:176: TypeError: Value is undefined and could not be converted to an object
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:178:13: QML Binding: Not restoring previous value because restoreMode has not been set.
                                   This behavior is deprecated.
                                   You have to import QtQml 2.15 after any QtQuick imports and set
                                   the restoreMode of the binding to fix this warning.
                                   In Qt < 6.0 the default is Binding.RestoreBinding.
                                   In Qt >= 6.0 the default is Binding.RestoreBindingOrValue.
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:180: TypeError: Value is undefined and could not be converted to an object
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:184: TypeError: Value is undefined and could not be converted to an object
Jun 26 07:28:43 org_kde_powerdevil[1244]: org.kde.solid.udisks2: Error getting props: "org.freedesktop.DBus.Error.UnknownMethod" "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/UDisks2/block_devices/sdd"
Jun 26 07:28:43 kded5[1093]: org.kde.solid.udisks2: Error getting props: "org.freedesktop.DBus.Error.UnknownMethod" "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/UDisks2/block_devices/sdd"
Jun 26 07:28:43 plasmashell[1141]: org.kde.solid.udisks2: Error getting props: "org.freedesktop.DBus.Error.UnknownMethod" "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/UDisks2/block_devices/sdd"
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:174:13: QML Binding: Not restoring previous value because restoreMode has not been set.
                                   This behavior is deprecated.
                                   You have to import QtQml 2.15 after any QtQuick imports and set
                                   the restoreMode of the binding to fix this warning.
                                   In Qt < 6.0 the default is Binding.RestoreBinding.
                                   In Qt >= 6.0 the default is Binding.RestoreBindingOrValue.
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:176: TypeError: Value is undefined and could not be converted to an object
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:178:13: QML Binding: Not restoring previous value because restoreMode has not been set.
                                   This behavior is deprecated.
                                   You have to import QtQml 2.15 after any QtQuick imports and set
                                   the restoreMode of the binding to fix this warning.
                                   In Qt < 6.0 the default is Binding.RestoreBinding.
                                   In Qt >= 6.0 the default is Binding.RestoreBindingOrValue.
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:180: TypeError: Value is undefined and could not be converted to an object
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.devicenotifier/contents/ui/FullRepresentation.qml:184: TypeError: Value is undefined and could not be converted to an object
Jun 26 07:28:43 kded5[1093]: org.kde.solid.udisks2: Error getting props: "org.freedesktop.DBus.Error.UnknownMethod" "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/UDisks2/block_devices/sdd"
Jun 26 07:28:43 plasmashell[1141]: org.kde.solid.udisks2: Error getting props: "org.freedesktop.DBus.Error.UnknownMethod" "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/UDisks2/block_devices/sdd"
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: Listener adapter polkit_qt_listener_initiate_authentication
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: GSimpleAsyncResult: 0x5584fe60b1e0
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: polkit_qt_listener_initiate_authentication callback for  0x5584fe5df200
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: Initiating authentication
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: Message of action:  "Legitimierung ist zum Einhängen von /dev/sde1 notwendig"
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: Action description has been found
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: WinId of the dialog is  14680070 14680070
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: WinId of the shown dialog is  14680070 14680070
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: Trying again
Jun 26 07:28:43 plasmashell[1141]: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:285:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: REQUEST
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: Request:  "Password: "
Jun 26 07:28:43 polkit-kde-authentication-agent-1[1130]: "Password: "
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: Dialog cancelled
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: COMPLETED
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: Completed:  false
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: Finishing obtaining privileges
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: Listener adapter polkit_qt_listener_initiate_authentication_finish
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: polkit_qt_listener_initiate_authentication_finish callback for  0x5584fe5df200
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: Finish obtain authorization: false
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: Finishing obtaining privileges
Jun 26 07:28:51 polkit-kde-authentication-agent-1[1130]: Finish obtain authorization: false
Jun 26 07:28:51 polkitd[1177]: Operator of unix-session:1 FAILED to authenticate to gain authorization for action org.freedesktop.udisks2.filesystem-mount-other-seat for system-bus-name::1.18 [/usr/bin/plasmashell] (owned by unix-user:karl)

Appears to be working without problem here…

Operating System: openSUSE Tumbleweed 20200622
KDE Plasma Version: 5.19.1
KDE Frameworks Version: 5.71.0
Qt Version: 5.15.0

Able to unmount USB sticks and CF cards (using a USB Lexar card reader) from the Device Notifier without any issues.

Same versions here. All USB devices but the GARMIN Card work smoothly. Even the GARMIN Flash unmounts properly.