Legacy4J Version

1.21-1.7.2

Mod Loader Version

Fabric loader 0.16.0

Bug/Glitch Occurrence Context

When the mod is installed on the server, the server itself begins to lag/ping a lot. But this for people who just a too away from the host. (Me from Russia to Belarussia host.)
Yeah, it's lag with Radmin Vpn. But without mod installed - everything so much better and fine.

Crash Report

No response

What happened wrong?

I made a 4 minute video to demonstrate this issue!

(Plz watch if you can.)

Could you show footage of you flying without the mod in the same way?
I think it's very unlikely to have anything related to Legacy4J in versions <=1.6.7, since there is nothing in these versions that could cause server slowdowns

Hmm. Maybe you right. Because in one moment, without mod, when i teleported to 30000000 cords i get 700~ ping. (It's 101% is radmin)

But there i just flying without mod.

Could you help me with this issue?
If you can, test version 1.6.7 of the mod to see if this happens (in this case you would have to make a backup of the server in 1.20.6), so I would already know the solution for this

So. I create a new fabric server on 1.20.6. Put l4j, fabric api, and that depend mod + wing's modpack.
Started with server.properties from 1.21 server.

I log in and it seems to situation is better, but i still have ping spikes while playing (mostly when i flying with elytra). I can interact with world immediately and i didn't get shulker lag when just opening them.

There a 3 minute non-cut video of demonstration witch mod installed.

We tried it without mod, and situation is just better, i don't get 200-300 ping when just flying/playing.

Fixed in version 1.7.3, thanks for reporting.