See wisp-forest/owo-lib#29

Things on 1.18.2 also declares a Mixin on OreFeature, but is not thread safe: https://github.com/wisp-forest/things/blob/1.18.2/src/main/java/com/glisco/things/mixin/Copenhagen.java#L25

This is a known issue fixed in newer builds of owo, sadly that fix never made it into the older Things releases. As 1.18 has reached end of support multiple weeks ago, this will not be fixed anymore
Cheers

@spoorn It should be fixed for 1.18.2: https://github.com/Bob74/things-1.18.2-fix

I have updated owo-lib to use Maldenhagen and set Things to use owo-lib.Maldenhagen instead of Copenhagen.

You need both:

• things-0.2.19+1.18.jar
• owo-lib-0.7.3+1.18.jar

@spoorn It should be fixed for 1.18.2: https://github.com/Bob74/things-1.18.2-fix

I have updated owo-lib to use Maldenhagen and set Things to use owo-lib.Maldenhagen instead of Copenhagen.

You need both:

* [things-0.2.19+1.18.jar](https://github.com/Bob74/things-1.18.2-fix/releases/download/0.2.19%2B1.18/things-0.2.19+1.18.jar)

* [owo-lib-0.7.3+1.18.jar](https://github.com/Bob74/owo-lib-1.18.2-fix/releases/download/0.7.3%2B1.18/owo-lib-0.7.3+1.18.jar)

Could this be put on curseforge @Bob74 @gliscowo ? in order to make the fix available to modpacks
It would be greatly appreciated ❤️

I've created pull requests if @gliscowo wants to build and upload the fixed versions on CurseForge.
There is not really more I can do :/