Yes I'd say it is possible. Seem this type of problems with other mods installed in games. The make the 12 volts dip too low and the 12v runs optos. So I've seem coils fire because the opto thinks there is a ball blocking the beam when it is just the opto failing. I've not heard of flippers before, but there are coils triggered by opto flipper boards so it is possible.

Unplug the light, if it does not happen it is the light. So if you really want light find a different 12 volt supply like a power brick.

I was thinking it was opto flipper boards. If it is leaf switches then just make sure they are not gapped to close.

For alternate power you can rewire the service outlet so it is powered with the game switch instead of always on. Then plug a 12 power supply into the outlet. Or wire and old PC power supply to the switch. Search on that, there are a few good ways.