Since update to 1.22
there is an input lag on the mouse

No lag on keyboard nor gamepad ( a PS4 controler in bluetooth via DS4 )

I'm on windows 10 x64
fresh complete reset ( had to in order to fix windows apps issues )
The mouse is a Roccat Tyon
Tyon's drivers 1.16
firmware 1.31

The lag is so strong it create a strong framerate issue

So far I've unistalled The witcher 3 completely and redownload base games files.

I keep you guys posted.

Edit :
Confirmed, the input lag seems to not appear in 1.21

Edit 2 :
Done some testing
In 1.22 uninstalling Game Overlay in GoG Galaxy had solved the issue.
Need more test to confirm it is not linked to another DLC

Edit 3 :
Confirmed that the overlay is the only one cause of this severe imput lag
This is a trouble that can only appear when using an assemble of GOG Galaxy Beta and Witcherr 3 WH 1.22


Solution :

Unchecking " Game Overlay " box
You can find it under "parameter" inside Gog Galaxy client
over all DLC installed.

Please admin close the subject.