Personally It looks like I’m not experiencing those crashes anymore… I don’t know if it could be related or of any help to others but after investigating a bit, I actually found out an abnormal usage of my GPU (constantly 90-100% in idle) due to the latest windows 11 update.
What I did is go to system → Display → Graphics → Default Graphic Settings → and disable “Hardware Accelerated GPU Sheduling”.
After that the GPU usage in idle is now 0-4%… and even with Unreal opened and viewport in “realtime” I get 2-4% usage and it isn’t crashed since then.