Alternative solution - just for sake of completeness…

Bookmark to 'newest', rather than just the top level domain, e.g.  
`https://superuser.com/questions?tab=Newest` rather than  
`https://superuser.com/`

This will ignore bumped questions entirely & only show posts by 'last asked'.  
It doesn't fix the issue, but it does mean you'll neither know nor care. This is actually my default bookmark style for all my regularly-visited stacks.