Unread stream includes items I cannot see anymore

After the old beta v5 bug tracker was hidden a lot of old comments I made in those bug reports are now showing up in my unread stream: https://invisioncommunity.com/discover/unread/

When I click to view anything I get properly an error that I can’t access it, though:

Oops!

We could not locate the item you are trying to view.
Error code: 2S136/V

The items shown in it are also from other users, not just mine. This leaves me with an unread stream with a huge amount of content that I cannot mark as read or remove.

Seems like there’s a bug with updating the search index permissions when the club category was hidden/moved.