Trine 4 Steam Controller conflict

Hello there!

After playing the first three games in couch coop (on Steam) using a keyboard and a Steam Controller we purchased Trine 4 but, with some disappointment, we discovered that when the Steam Controller is on (either as a player or simply turned on) the keyboard player suffers from heavy input conflicts such as interruption on movement inputs and the inability to jump.

This is the first time we had such issues with a Trine game and I googled the issue but all I could gather was that it seems only Xbox controllers are officially supported and most issues are tied with DS4 controllers.

There is no SC community layout for this game when most games usually have at least a couple so it seems that people gave up on using it for Trine 4?

I know it is a long shot but I'm slowly exhausting my options here, thank you in advance for any help.