I've never seen this before after almost 20 years in Jira.
This morning I had at least two teams create Sub-Tasks issue types (development/qa/ui) off of the stories in the Backlog of their Scrum Sprint Board.
About an hour later I got reports that these tickets did not get created, followed up with they are created but have no Parent Story !!
Around the same time I had another team report that a user dragged her Sub-Tasks into the Done column and selected yes to Move Story To Done as all the children were resolved. This was done and children disappeared, leading that team to think they were deleted... they were not they were Orphaned .... Please see screenshot.
I've resolved this manually by doing a move and selecting the parent issue with no other changes.
Can anyone shed some light??
Issue Type

Orphaned Issue
