Mouse sensitivity is suddenly and forcibly changed

My one too!

>My mouse has a button just behind the mouse wheel

I doubted it first and checked mouse itself sensitivity on G HUB, but it's not changed.

Are you able to test it using a different mouse @Kakiage_zack?

Darko

I tried another mouse and it occurred again. Those are both made by Logicool.

And the issue occurs only on steam platform. Never happen on Origin ver.

If it only occurs when playing on Steam @Kakiage_zack then it may be no harm speaking with Steam support.

Darko 

My G Hub never detects Apex launching correctly so I have to force the mouse profile every time. 

I've tried adding the game multiple times. It will detect it, sometimes it will almost work.

G Hub settings--> Persistent Profile--> Apex Legends(or whatever you named the profile)--> Click yes on the "are you sure?" at the bottom in blue.  Then I change it back to none after gaming.