Seemingly random disconnects every few minutes on dedicated server

[Assaro]

Description

I have set up a server with Sable, Create & Create Aeronautics, and a few other mods (see list below). At random intervals (20seconds to 10 Minutes) me and my friend are getting disconnected simultaneously. This started after about 20 minutes of testing the mod
Nothing crashes and we can reconnect instantly. He is connecting via the internet, and i host locally, so Internet problems can probably be ruled out.
I removed every mod except Sable, Create & Create Aeronautics but it still crashes.

Client logfile: https://mclo.gs/JVJjhab
Server logfile: https://mclo.gs/YtdonqZ

Server zip: https://drive.google.com/file/d/1KyZn_PI5a0ThzJOicRAngLzxweEUe7o9/view?usp=sharing

Mods i used before the error occurred for the first time:

appleskin-neoforge-mc1.21-3.0.9.jar
chat_heads-0.15.1-neoforge-1.21.jar
cloth-config-15.0.140-neoforge.jar
create-1.21.1-6.0.10.jar
create-aeronautics-bundled-1.21.1-1.1.3.jar
entityculling-neoforge-1.10.1-mc1.21.1.jar
ferritecore-7.0.3-neoforge.jar
jei-1.21.1-neoforge-19.27.0.340.jar
lambdynamiclights-4.8.8+1.21.1.jar
lithium-neoforge-0.15.3+mc1.21.1.jar
MouseTweaks-neoforge-mc1.21-2.26.1.jar
NoChatReports-NEOFORGE-1.21.1-v2.9.1.jar
sable-neoforge-1.21.1-1.1.3.jar
sodium-neoforge-0.6.13+mc1.21.1.jar

Game Log

https://mclo.gs/JVJjhab