Overwatch 2 mouse responsiveness

In Overwatch 2 - my mouse feels laggy/heavy/floaty (slow) in QP and Competitive but it feels extremely responsive in practice mode.

My fps is stable at 60, 120, 200, etc - in practice mode my mouse feels crisp and responsive - but in any other game mode (e.g. Quick play) my mouse feels heavy, slow and it can be felt straight away (it can also feel different from game to game) .

I’ve monitored my network graph in the game (via ctrl shift n) - nothing stands out - and i’ve also monitored my packet loss/ping in winmtr and again nothing stands out.
I’ve also played around with the usual stuff (reduce buffering, etc) - but it doesn’t help - but again the game is very responsive in practice mode only (and on rare occassions in some QP/Competitive games).

I’ve tried directly connecting to the router too via ethernet cable (same issue).

My specs:
AMD Ryzen 7 5800x
16GB
RTX 3060ti

I don’t understand why the mouse is so crisp and responsive in only practice mode…