Long game freezes/crashes?

Game is freezing completely every 30 mins or something and it's like 20-30s freeze. Happening since new league and possibly new NVIDIA drivers. It looks like crashing kind of, game is not shutting down but everything else ingame restarts, similar when switching from dx12 to Vulkan for example.

I am STILL getting the "Freeze for 10 seconds then game reloads" bug.