Darth_Caesium

This happened to me on Linux Mint 20.1 (not via VM). My CPU is an AMD Ryzen 5 3400G with integrated Vega 11 graphics. On modded Minecraft, version 1.16.5, I used the /locatebiome command to locate a specific biome in the Nether and then teleported to it. The chunks stopped loading after awhile and the chunks to my Nether portal had unloaded and wouldn't load. After 15 minutes or so, I proceeded to press Save and Quit, hoping that this would solve the problem, but it became stuck at the "Saving World" screen. Even 50 minutes later, it still hadn't saved my game. Initially, I thought that this might be Optifine's fault, but I found this page and realised thay my case perfectly matches this bug.

This happened to me on Linux Mint 20.1 (not via VM). My CPU is a Ryzen 5 3400G with integrated Vega 11 graphics. On modded 1.16.5, I located a specific biome in the Nether amd then teleported to it. The chunks stopped loading after awhile and the chunks to my Nether portal had unloaded and wouldn't load. I proceeded to press Save and Quit, and even 50 minutes later, it still hasn't saved my game. Initially, I thought that this might be Optifine, but my case perfectly matches MC-149215.