When a question that is being followed is deleted, there's no apparent way to stop following it. For example, for me in the Math SE, there's the second entry below:
When I click on that entry to see the post, there's no indication anywhere on how I may possibly unfollow it:
If I instead click the "View More" link at the bottom of the "Followed Posts" section, I get a list of the followed posts, as shown below:
Unfortunately, clicking the red "Unfollow" link here gives the following error message:
This seems like a somewhat inappropriate error message as I'm not trying to "vote" on it.
I don't see anything else to try. Is there any current way to allow us to stop following a deleted post and, if not, are there any plans to add one (e.g., perhaps allow the "Unfollow" link to work for a deleted post)?
Update: A closely related question How do I unfollow a deleted question? has been updated to ask about this same issue.