Chunk Loading throttled on some IP's running Minecraft Fabric client

Hey! Running a minecraft server via Playit.gg, on some IP’s using the Fabric server client, the chunk loading is supper throttled. Paper works fine, just not fabric. Earlier I had a different IP that worked fine, but due to some bugs I had to switch and the one I have now is worse. Any help?

I’m experiencing the same kind of throttling on forge, please let me know if you find a fix.

Saddly I couldn’t. My best guess is that some ISP’s just route things in a way that sucks, and that’s the only idea of what happened to me. I ended up just using UPNP to force open a port, and I bought a domain from namecheap so I wouldn’t have to give out my IP address.