Make guitar work in GH3 & GH:WT (Lutris)

Hello fellas. I'm making this post because honestly I ran out of ideas.

I have a wired Xplorer X360 guitar controller that works out of the box in Clone hero on Linux, as well as GH3 and GH:WT on my Windows, but it doesn't work on the same PC inside both GH games on Linux (I have a dual boot with a Pop Os).

This controller is properly detected by the system as well as Steam (I can configure it as much as I desire). I've installed GH3 and GH:WT via Lutris, but I cannot make the guitar work. I've tried launching the game with Steam Big Picture but it doesn't seem to help. The games just completely don't respond to the guitar.

Do you have any ideas how can I force the guitar to work with GH games running on Lutris?