I've been trying to make a mod pack for a decent time now and almost done, but I keep having this random problem where if I try to swim in water, I get launch forward. You can see me bouncing above the water when I try to jump in. I can drop in perfectly fine though. I know it's not the best quality, but I made do with what's available.
EDIT: I have solved this issue. It was just an outdated version on inventory pets that had an issue in its coding.