When you change between mini 4 and Mini 5 drones on the RC2 the routine includes comments that firmware has been installed. I’ve not checked the firmware versions for my RC2 as I’ve not installed the latest updates so I don’t have the...
The OP may not have access to another controller to try.
Anyway, he was only on the forum for about 30 minutes, never to be seen again, so not really interested in finding out the real reason his drone was drifting to the right!