Bug report:

1. Whenever I run the modpack the memory usage starts at 70%, but increases untill about 92% and then starts freezing. I have allocated an aporiate amount of ram about 6 which should be enough to run this modpack.

Hardware:
AMD Ryzen 5 5600X 6-Core Processor 3.70 GHz
16gb of 3600mhz ram
3070
samsung 980 pro ssd 500 gb (boot drive, where all minecraft related software is installed)

Server:
Apex Hosting, austrailian servers.

This is my first time using this website so I'm not sure about how it works so I might need extra help

I'm having a similar problem.
when i start the game the menu uses 13GB of ram
when i load up the world the usage spikes to 18GB of ram until it crashes giving me this error
The game crashed whilst ticking entity
Error: java.lang.NullPointerException: Ticking entity
Exit Code: -1