Hmm, as described in earlier post I got one stuck torpedo way back when, then no more, ever.
Then I left the pen loaded with electrics. Four of the bunch had some sort of malfunction, either running very slow or not at all.
Way back when I would put an electric in the stern tube. Then it occurred to me that it was probably an electric that "stuck" the first time.
Back to 100% steam, no more problems, period.
Seems to me that it's not a bug and it's not mods. It's the game design. The early war electrics are not fully dependable. There is a disclaimer on the load page in the sub pen warning us about that, but I guess we don't pay attention to that stuff.
