I have this issue too it's from the board being dropped a lot / age. I bought an extra used controller and some 3d printed replacement shoulders and I've been able to fix them pretty well. Unfortunately there is no way to fix the board I wasn't able to discern any kind of issue with the parts but I don't have voltage schematic to figure out what might have went bad I suspect a capacitor or something. I still use them every day though they are great. I hate the new steam interface though cause they dropped a lot of advanced features

Firmware up to date? I have no issues with mine although the range on the dongle is pretty weak which did cause it to drop connection but it went away completely after running a USB extension cable from my Deck’s dock so the dongle is closer to me when I’m sat on the sofa.