Although, many (like me) are staying on patch 7 for a while until all the relevant mods are updated. Vortex will need a way to determine what version of the game is being used.
This is possibly a known issue with SSE Engine Fixes. Instead of saying "newest version", give specific version number for your .exe, SKSE, and SSE Engine Fixes.
A better question to ask is why is this happening to only you? I left my pc on with Vortex open for over an hour and never observed your described behavior. Temps fluctuate between 28 and 31 degrees celcius (Ryzen 5600X for reference).