I have been playing this mod for a short while now, and I have managed to enter Chapter 3 with some difficulty. However, I've been having issues when I return back to the Antimatter Dimension, in that while I can move around, I am unable to interact with any items - and when joining after closing the world, I spawn inside some of the antimatter blocks, which crushed me to death and led to me having to make a long trek to recover my lost items. I'm not sure if this is due to my laptop being a bit of a potato or an actual glitch, although it may be the former due to other modpacks I've used having similar issues, although, with them, it was in multiplayer.