Lithium version 1.18.1-0.7.6
Origins version 1.8 1.3.1

Let me know if any other info is needed I am not the most technically minded 😔

I believe this has been fixed in the latest dev build of Lithium

Where can I find this dev build?

It was due to Lithium's new rule for optimizing entity suffocation checks.

To disable this new optimization rule, you can set the value of the mixin.entity.collisions.suffocation rule in the lithium.properties file from your Minecraft's (or server) config folder to false, like so:

# This is the configuration file for Lithium.
# This file exists for debugging purposes and should not be configured otherwise.
#
# You can find information on editing this file and all the available options here:
# https://github.com/jellysquid3/lithium-fabric/wiki/Configuration-File
#
# By default, this file will be empty except for this notice.
mixin.entity.collisions.suffocation=false

And how would one access said config folder to change said folder to false?

And how would one access said config folder to change said folder to false?

The filepath would be: .minecraft/config/lithium.properties
If it's on a server, swap out .minecraft with the server folder

mixin.entity.collisions.suffocation=false

What should I do if I'm playing on LAN ?

mixin.entity.collisions.suffocation=false

What should I do if I'm playing on LAN ?

In that case, the LAN host would have to modify the configuration file for Lithium on their end

I can confirm that in lan it doesn't seem to work

Any solutions?

the lan host is basically the server host, so if the owner of the lan server changes the config in his files it should work

Yeah I'm the host and the file looks like this

https://pastebin.com/QEnXCwpv

But whenever I'm in walls it still hurts me

I can confirm that in lan it doesn't seem to work

Any solutions?

I was having the same problem after downloading the Medieval MC Modpack through the curseforge app. I even went into User>Twitch>Minecraft>instances>Medieval Fabric [FABRIC] 1.19 & 1.18.2>Config>lithium.properties and added mixin.entity.collisions.suffocation=false to line 8. It's works! Leaving this here incase anyone else is confused about the filepath if you're using curseforge. Also, you can do this while the game is running, but it won't work until you close the game and rerun it.

As of Origins 1.9.0, the mixin.entity.collisions.suffocation optimization rule should now be automatically disabled if Lithium is installed alongside Origins/Apoli

I take damage even though I do not have lithium. Any other mods known to cause problems?