The Haptic feedback or the vibration sensitivity when pressing the air triggers is changing randomly from weakest to strongest. When i open pubg mobile, its weak. So i open the air trigger settings and then click on reset the sitter trigger sensitivity. After resetting the sensitivity of each triggers, it's back to normal. I got it only after the latest update
I don't have a lot of users mentioning that their sensitivity changes so maybe it's a more specific bug than general performance. If you want, we could log your phone to see if we can find why your sensitivity changes?