I've had my card since 14th of July and never got this problem, but then I usually run my games with V-Sync on, have a custom fan curve set (70% speed at 65C+) and the only really demanding titles I have played since purchasing it were Fallout 4 and Deus Ex: Mankind Divided.
So a dumb question for the people experiencing this - were you running with unlocked framerate? Default or custom fan curve? I've lodged a support ticket asking about the thermal pads situation, kinda worried now.