Quoted from Mr_Tantrum:L2 is the best ROM for the game in most people's opinion. I will say, that I've been running L2 for 4+ years, and in that time I've experience the bug 4 or 5 times in hundreds of games. Regardless, it has been rare for me (oddly enough, it mostly occurred early on after installing L2). In those moments when it does occur, I just turn the pin off and consider that game lost. Not always easy to have others do the same when so much is going on, however.
Here is an explanation, but it might make your head spin: https://pinside.com/pinball/forum/topic/getaway-club-dispatch-run-a-make-on-license-plate-kingpin#post-1407053
I'm glad to hear this multiball bug happens rarely... because it really sucks.
So I guess the only solution to all these ROM bugs would be to install a P-ROC board and re-code the game from scratch.... quite a task!