I've been on and off trying to solve this for around a year maybe. Uninstall and add mods few at a time to try and rule out the problems. Nothing. I've googled the issue and have found nothing to help. Forge loads up just fine and I'm able to spawn in a world with no crashes. The issue is that the chunks do not load. I fall infinitely. I only come across pre-generated structures like temples, dungeons, and slime islands. I allow around 10GB of RAM for the pack and my computer holds 32. Back when I had my old computer I thought it was a graphics card issue, not able to load it. And I recently built a new PC with a Nvidia Geforce RTX 2060. So I ruled out that issue. I have googled that the mob entity level could be causing the chunk errors, I made a new world and turned on peaceful, same thing. I always played modded in 1.12.2 since I consider it the sweet spot for all the mods I enjoy. Love mods that give me extra things to do and adventure. I use the Twitch Launcher for MC. Any input or suggestions would be really helpful. Anything I may have skimmed over?