Players unable to join: Payload size exceeds 1048576 bytes [1.16.5]

[Katadora]

Been trying to set up a server for myself and a few friends through BisectHosting. I ended up replicating the server on my own computer to see if the issue persisted (if it was on bisect's end) and it was still there.

Every time a player tries to connect to the server they start connecting but after only around 2 seconds the player is disconnected with the error message Payload size exceeds 1048576 bytes. 

Upon inspection of the server debug file, the player always disconnects while fmlhandshake ticking packet info is being sent, and I have repeatedly made sure the mods and their configs are identical. I tried to get RandomPatches to increase the max allowed byte size, as the default seems to be 32767, but either something is wrong with it or some other mod is limiting the packet size limit.

 

 

Server Debug: https://pastebin.com/xZLbtdQB (only includes portions from after the server launched as I couldn't upload the whole file)

Server Log: https://pastebin.com/yrJ3tNaW (similarly only after server launched (hence the weird say commands)

Client Log: https://pastebin.com/inSzZV96 (whole thing for once)

Modlist: https://pastebin.com/Qvurg45j (All but Optifine and BetterFoliage are present on the server as they have caused issues during startup)

 

Honestly stumped on how to fix this, been working on it for 10 hours across two days to no avail.

[Katadora]

Client debug: https://gist.github.com/Katad0ra/5197fba36a2ead0c81d73c71fd2df83f

Server debug: https://gist.github.com/Katad0ra/9e53ac25ffbfa6594307e9b52ccc9ac9

With how cryptic the client debug is, I don't really think there's anything to go at from it...