Incompatible with the latest commit of Iris (IrisShaders/Iris@8c03291 at the time of writing). Crash report: https://gist.github.com/DragonEggBedrockBreaking/320785bdc540a4fd7d39f34052a76aae

Issue report on Iris' issue tracker: IrisShaders/Iris#809

Isn't this caused by the batched entity rendering iteration that is being removed in the next (Iris) version?

It seems like Carpet's method is already changed (redirected) by the implementation in those dev builds that sorts the entity list, that was committed as "temporarily" (in commit: IrisShaders/Iris@d0a56ee, conflict located at: https://github.com/IrisShaders/Iris/blob/8c03291f78d1d7a312bfb06ed2e48fdab75a7f74/src/main/java/net/coderbot/iris/mixin/MixinWorldRenderer.java#L289-L292).

This was fixed in IrisShaders/Iris@df9a932