Seems that in a recent rollout of Jira Cloud, the Sprint board (on company managed project) stopped auto updating when changes occur.
I am finding that when status are updated, or as I move sub tasks across the board and automation changes the parent status, the Sprint board used to update automatically and it no longer does. I constantly need to hit refresh on the sprint board (similar to how this has always been on the Backlog).
I assume that there is a bug that is causing this and it will get fixed, but it is quite annoying now.