Never had anything like that happen. All 4 of our tenders have diesels and Allison's, now. We do have one with a Detroit that has run backwards a couple of times, though. So far it stopped when you pull the stop knob.
We didn't send our tenders out when they were Korean vintage Deuces. It's a cryin' shame, there are only 3 of us left that can remember driving them. Even now, we only send our Pete's with Cat engines. Not as comfy as our Type 5/6s, but good enough. Just had to have the A/C serviced, turns out most of our problem was 24 years of candy wrappers into the air box. Evidently the intake for the A/C is under the dash, passenger side feet right next to the firewall. So many years of throwing candy in our local parade must have took it's toll.
I enjoy tender duty now and then. A steady diet of it would be boring, but for a week or so, I'm good. I suspect that if I could keep busy, it would be OK for longer.