Qt 5.12 update has introduced a benign (AFAICT) Dolphin error

After updating to Qt 5.12, whenever I logout or reboot or shutdown out of kde/plasma, I receive notice that Dolphin has closed unexpectedly via a segmentation fault. Happens under both X or Wayland environment … the notification under X is more explicit (i.e. notification box/window), whereas under Wayland a notification is issued in the system tray area.

Anyone else see this?

BTW, it appears benign because I always leave Dolphin running with several tabs and split tabs, and it appears Dolphin is running exactly the way I left it from the last session.