on just one client i have problems with auth.
its nexcloud-client 2.6.1 with both, fedora-package and appimage
i have multiple accounts and i deleted the user-config and started over, but problem arises again.
after some time (tens minutes, or hours) some of the connections are in logout-status and have to be reauthorised by webbrowser.
problem happens wirh nextcloud-servers in version 16 and owncloud-server in version 10
i use the client on multiple fedoras in version 30, but problem exists only in one.
no entries in messages