Today i had some chance to experiment with it a little bit. It seems sshfs is the source of the problem. KepassXC gget to a D state if i check it with top command, and if i kill the sshfs processes keepassxc is going to work again. For now i made a local copy of the password file ,and i’m going to keep experiment with different syncing options, mainly with rsync and maybe with syncthing.
Yeah, for now i just wanted to play around a bit with Whonix. I know it had been a bit (as you said) complex. I will try some more simple solution.
In the meantime i will study the linked wiki page!