The surest easy solution is lower lofts in heads that aren't low COG.
The best solution is to stop flipping. 🙂 But I know that's hard. I fixed my flip during an off season a few years ago. You can't hardly fix it while hitting balls. The presence of the ball short circuits all of your good intentions. So no balls, just swings at a spot on the carpet. Being sure to strike the carpet after the aim spot. It will get easier as you go. A few swings every day, all winter. By spring when you finally hit a ball, you won't believe what has happened.
I sure hope that someone, anyone, takes my advice on this before I die. I'm 62, so there's hope.