What’s so strange is that it seemed to be one or two of the units I had on service would do this, all installed at the same time, and with software upgrades for this issue. And not just on the UOT limit, but buried a bit higher as if the unit was in intermediate speed or the brake picked below the top landing and the car flew into the OH.
The tough part was finding out that the stupid split link operator wasn’t set up to where the car doors could be forced open. Boy I hated that one!