Win10 in VirtualBox cannot copy files in shared folders

VirtualBox 7.0.18
The host is Leap 15.5 and in the virtualbox is Win10.
Shared folders are already set up.
The question is:
Win10 can copy files in shared folders when it is just started, but it cannot do that after a while.
It is the same after win10 restart.

Has anyone encountered it?

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