This is for a physical desktop. We’re running the Desktop software, version 5.3.10
When users connect to a session it seems fine. Then if they drop the connection and try to reconnect they get the white screen.
For other users they can reconnect fine and resume their existing session.
If one of the users who things seem to work fine for start a session anyone can connect to it, disconnect, reconnect, etc and it’s fine.
If one of the users having issues starts a session, and lets others try to connect those people seem to have the same issue.
So it seems to be related to the person who starts the session.