Did these sancs in question crash, or fork, or are they still synced guys?
In my case one stopped and the others were stuck on that block, still running. I had to do a -rescan and it was ok.
Ok, very curious if 1145 would have saved your node.
Unfortunately I didnt upgrade yet, so I cant answer that.
I'm doing a test to see if upgrading and restarting without reindexing works or not.