Disclaimer: none of the mod's I'm currently using were made/bought in the last decade.
Sometimes a MOD might last 'forever' other times not so much. Frankly IDK why the industry moved away from VV mode to VW mode as YOUR issue might still crop up, however it would manifest as a 'weak vape' rather than the 'hot vape' you got.
Actually, if that mod DOES have a proper VV mode that would solve the EFFECT of the issue however I'd guess along with others that an questionable connection on the atomizer or 510 connector is at fault here.