I'm using the latest snapshot 1.13-pre3 and while flying in creative mode (SP) chunk loading/rendering suddenly completely stopped. I could still move around and place/break blocks but it seemed like the game time was frozen (no block updates). I was using a night vision potion while flying around and the potion timer was frozen at 0:00. My screen was flickering (most likely from the potion running out). When I tried to close the game my computer stopped responding (black screen) and I had to use task manager to get back to desktop.
Can't load into any world. Loading always stops at 'Preparing spawn area'.
edit 1.13 pre4