Functions in test environment not working

I'm on the latest snapshot for MCreator 2022.2 and all of a sudden, the worlds in my test client don't work properly. It's like I'm permanently lagging even though everything else on my computer works fine. The same issue occurs every time I make a new world as well. I can't throw projectiles, and blocks that are supposed to disappear after jumping on them make me get stuck in the block until I fly out with Creative Mode. I tried several things and I still have this issue.