I noticed that when changing the application (e.g. from email to administration) the side panel remains locked (e.g. on email)
Do you see anything in the JS console, when that happens?
What is the type of installation you use?
The problem occurs occasionally and I am currently unable to reproduce it. As soon as it occurs again I will try to get the data you asked for.
I was able to reproduce the error (see video)
This is what the console reports