A build shows the reason it got triggered, when hovering with the mouse. (example attached below)
The retry always shows here "Re-scheduled after Failure".

It would be nice to see here, what actually caused it.

• "Re-scheduled due to matching RE in console"
• "Re-scheduled by <USER-X>"
• Re-scheduled after Failure"
• <other possibilities ?>

Currently I know of no way to tell, if a user clicked "Retry" or Naginator got triggered, because it was configured to do so (on RE match)