Hi my system specs are : AMD Ryzen 9 3900x, Asus Strix ROG X570F, 64GB RAM, Nvidia 3080.
Seems that the issue happens so far when I try to make changes in my level and save or if I do some material instance changes and save. It either freezes at 70% or right at 0%.
Sometimes it will work fine other times it will freeze 30sec later. Happens so far only in 5.3 preview and only first ever time I encountered this.