The board should be gone. There is a dialogue box to warn that all the cards will be deleted etc. but then nothing seems to happen. It's the same board with the same URL and unique id, still there with no clear error (I haven't checked the detailed server logs yet).
A few more notes:
Refreshing the whole Focalboard website doesn't make any difference either.
Creating an empty board or using a template e.g. "Competitive Analysis" (random) and then deleting it right away does work.
Later, once the session has expired or something, go back to the page
The "something went wrong" generic page shows up instead of the workboard
When clicking on the "back to home" blue button works but this error happens every single time.
Expected behavior
If the session has actually expired then the user should be prompted to enter their password again. If the session hasn't expired or can automatically update itself with a cookie then it should automatically redirect to the page when the session expired.