Issues with TX15 Max Radio - Seeking Help

I recently bought the TX15 Max and a happy model M8 freestyle, the radio seemed to be faulty as it would lock up literally anytime I changed a setting (so frustrating) I did manage to bind them and fly around in my living room for a bit but then the radio just died (sent it back for the store to fix or replace, still waiting but it’s only been just over a week) anyway my question is I’ve gone back to my old radio a RM Boxer. It bound easily enough as I’m using expresslrs but when I arm it and raise the throttle the little drone wants to go to the moon, no settings have been changed from when it was bound to the tx15 and it flew fine then, can anyone tell me what the problem could be and why it’s doing this. All my drones are set up exactly the same, same channels and switches.. any help greatly appreciated.