YouTuberGadgetsBoydiscovered the problem while trying to see how long the new camera could record on its highest parameters.
Turns out that’s about 20 minutes, though that might also be circumstantial.
It might be a consideration for future modelsthough this hasn’t been said or even implied, either.

GoPro
Given how specific recording conditions have to be, this is understandable on GoPro’s part.
Just try not to push it too hard for too long, yeah?