Have id’d the problem origination version.
Rolled back to 8.5 and opened a template I’d done a year ago, and went up each point release dropping in a couple of the problem blocks. If it worked, I quit without saving, moved up to the next point release and tried again.
The Issues start with 8.10. 8.09 does not have (at least some) of the big issues I’m seeing in 8.10 and 8.11.
Fortunately the edits made in 8.10 aren’t breaking the file in 8.9 (at least so far, I haven’t tried everything).
Moving on to try to get these damn elevations out so the can start terminating gear.
I’d kill for the last 3 days of my life back.