I welcome the new change related to validation and flips. for the selection of the bad ones, I got the same flips that I had during the second circle of validation. so I could directly mark the bad ones, which bothered me while solving.
Both your PC and internet connection are great. But I have no idea what would cause node to restart in your case. I have never seen this kind of behaviour.
In any case, next validation should be way easier for everyone, since network has split into shards for validation transactions. That means your node will not communicate as much as before and it should go more smoother.
btw. Today everything going smooth and well, although exactly the same configuration was used on my part, like on previous validation.