Xbox series x crashing to home screen in the middle of gameplay

Recently I’m experiencing annoying random crashes during gameplay.
it happens at random, any time, the console crashes and goes back to desktop.
I’ve been looking everywhere on internet and no reliable info has been found.
As far as I know, based on what I’ve seen this is a symptom of overheating.
According to this video:
I see we can add a fix to this problem, but the silicone conformal coating (modified) is nowhere to be found.
any help??