Theres just random input on my Switch Pro Controller, keeps opening inventory, walking, pausing and all sort of that stuff.

Workaround is using BetterJoyForCemu which emulates an Xbox 360 controller, but that inverts A/B and some cases Y/X.

Using Fabric 1.16.5, Windows 10 and fabric api. (no optifabric)
Latest version of mod. (v 1.5.0)