Your system information

• Steam client version (build number or date): May 27, 2020
• Distribution (e.g. Ubuntu): Pop_OS 20.04
• Opted into Steam client beta?: [No]
• Have you checked for system updates?: [Yes]

Please describe your issue in as much detail as possible:

Steam is unable to detect certain button presses on my controller. Controller is a Horipad S for Nintendo Switch. Buttons that don't work are ZL, ZR and the control stick clicks. (JTKtest button number 6,7,10,11)
Had to add line: KERNEL=="hidraw*", ATTRS{idVendor}=="0f0d", ATTRS{idProduct}=="00c1", MODE="0660", TAG+="uaccess" to /lib/udev/rules.d/60-steam-controller.perm.rules

Steps for reproducing this issue:

1. Add line ERNEL=="hidraw*", ATTRS{idVendor}=="0f0d", ATTRS{idProduct}=="00c1", MODE="0660", TAG+="uaccess" to /lib/udev/rules.d/60-steam-controller.perm.rules
2. Open game Project Cars 2
3. Try to reassign controls.