Thank you for drawing our attention to this issue. It would be very helpful if you could send a problem report from Paratext for this, it will help the developers see whether it’s a problem with Paratext or a project configuration issue.
To do this, go to Main menu > Help > Give feedback
and from the second menu in the Give feedback tool, choose Report a problem with Paratext
. You should report a problem at a time when you’re in a project where you are experiencing the problem. Please do tick “Automatically include screenshots of Paratext windows” if you’re happy to do that.