Jump Starting Equipment

This probably doesn't fit here but not sure where else to ask. I used my 100 hp Kubota tractor to jump a Case skid Steer off a few weeks ago. The skid started and the tractor stayed running everything seemed normal. Several days later I went to use tractor and it wouldn't start. To make a long story short the shop says boosting the skid fried the Engine Side ECU on the tractor. Has anyone seen this issue on equipment? Both were 12v systems.

Jump Starting Equipment