2015 Ford Transit electrical system problems

While driving on the highway, acceleration shuts down and I lose the ability to control speed. I had to coast to the side of the road even though the engine was still running and I was rear-ended. After I shut off the vehicle, it turned on and returned to normal operation. This has happened multiple times. The throttle body was replaced in 2021 at 117,444 miles and is having this issue again now. I have a fleet of Transit vehicles and this has happened on 4 transits from 2015-2018 a total of 6 times now.

Tl* the contact owns a 2015 ford transit. After retrieving the vehicle, the contact drove the vehicle to his residence. The following day during rainy weather, while attempting to start the vehicle, the engine failed to turn over. The check engine warning light was illuminated. The vehicle was taken back to the dealer where it was diagnosed and determined that water entered the electrical compartment causing the fuse to fail. The vehicle was repaired however, the failure recurred during a rainy day.