RAD2-1.16.5-1.14
Minecraft launcher
Singleplayer
Not as much of a crash. More of a freeze that causes a memory leak loop, claiming more memory outside of the allocated bounds, a few megabytes every second. There is no pattern I can see with it. Persists on multiple worlds, needs the player to move and play - not moving in a test world on peaceful mode avoids this. I have kept making new worlds, updating between versions and attempting to make sense of the logs. Oddly, they stop logging about 3 minutes before every freeze.
No crash log because the game does not generate any, strangely.