malte0811

Can you reproduce this with fewer mods, ideally FC and just one or two more? I assume that removing FC fixes the issue?

Please check the file permissions on the FerriteCore config in `config/ferritecore-mixin.toml`. The user running the server has to have write permissions to this file. If that is not the issue,...

Is there anything "interesting" at the end of the log file when this happens? I assume this does not happen without FerriteCore installed? I need more information to fix this,...

Forge/NeoForge have some strange behavior relating to Mixins and "early loading errors" (which includes missing dependencies); I don't think I can do much about this on my end.

This is actually already fixed in 2aa56a0def18a94574bc4c0f6e1aea00db1709a5, but apparently I never released a build with that fix. I'll try to do that today.

Is the pack you are using available on CF/MR? The "usual" cause for this is a bug in another mod. If I have the modpack I can find the problematic...

Does the build for 1.19.4 work on that snapshot? If not, please post the crashlog here and I'll try to put together a basic beta this evening.

Please upload the full crashlog. You should never download mods from 9minecraft, they are known for re-hosting mods without consent of the modders. CurseForge and modrinth are the main "good"...

What version of MC, FerriteCore, Optifine and Optifabric are you using? Is the lag spike definitely worse than without FC? You can see a graph of the time per frame...

I'm unable to reproduce this in a clean superflat world with default settings. Did you change any settings? Are you using shaders or resource packs? Is there anything special in...