Just did an upgrade to 3.2.5 on Mac OSX 12.1. Previously working fine. Using Safari. Now it is too slow for use. After it finally loads I click on file menu and it takes over 30 sec for the menu to show up.
A previous notebook was loaded and if I scroll down the new sections do not render.
You are correct it is meant to be tagged as Jupyterlab.
I have done some additional troubleshooting. I ran jupyter server list from the terminal and found 3 servers running. I did not know how to shut them down from the terminal so I did a system restart and verified that no servers were running after restart. I then launched jupyterlab from anaconda navigator and it started up normally and was responsive. I checked in thermal again and found only 1 jupyter server running as is to be expected. So I am guessing that was the root cause of the issue, though I do not know how multiple copies of the server got launched. I am very diligent about stopping the server when I am done with jupyterlab.
Since restarting and validating that only one jupyter server is running, I have not seen the problem reoccur. Mu guess that the multiple servers running was the root cause. I think we can list this issue as closed. I wanted to post my resolution if someone else runs into the issue.
Andy