Mine has started doing it on and off. A full restart seems to fix it. I use rest mode 100% so maybe it’s just recalibrating or resetting it with a restart.
Contact Cleaner by WD-40 Specialist - Non-conductive Spray Suitable for Use on Sensitive Electronics. Removes Dirt, Dust, and Flux Residue. It sorted my controller out. Need to give mine another little. I think skin cells just end up clogging them up.