It could be a return of the ol “stray voltage” problem, remember the F16 is fly by wire and over 30 crashed in its first 36 months of operations back in the late 70s & early 80s due to bad wire harnesses, etc.
Glad he got of unharmed.
Excuse my ignorance: is ejecting just matter of “pulling a trigger” or do you have to unlock this and that and pull the other thing and a blast curtain, like in the movies? A finger on the trigger could get itchy, as they say.