Hello,
We've had this sprint board for years and we didn't change anything. I ended one sprint and chose to automatically move a few open issues to the next sprint. When I started the next sprint and opened the Active Sprint board, those tickets were missing. When I opened the backlog view and looked at the sprint from there, the issues were there. When I opened each individual issue, they were appropriately assigned to the active sprint.
> there are no changes to board filter
> there are no special filters applied
> I tried taking them out of the sprint and putting them back in. Nope.