Sometimes early in a workout before sweat. I don't lick or wet it, so that's probably it for mine. Usually it sticks in the 130's for a minute as I'm warming up and getting into Z2 before working.
I've had corrosion issues on the button snaps on my Wahoo. Very disappointed about that. I went with it for the bluetooth since my old Garmin is Ant+. I will likely swap back to the Garmin for on-bike at least as it was more reliable I felt.