Shulkers don't spawn in the End dimension when certain mods are installed

[xenoramos]

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• This is a crash. Please upload, Pastebin, Gist or copypaste the whole crash report along with this issue.

• This is a mod incompatibility. If I do this in vanilla Forge with only Et Futurum Requiem installed, it works normally.

Version number of Et-Futurum-Requiem (IMPORTANT)

2.5.0 rc1 (but previous versions as well)

Describe the issue (IMPORTANT)

Despite config allow spawning Shulkers, they never appear. But spawned manually they work just fine, no issues.

Mod list (OPTIONAL)

Baubles-1.7.10-1.0.1.10
CodeChickenLib-1.1.8
CodeChickenCore-1.1.11
ChickenChunks-1.7.10-1.3.4.16-universal
EnderCore-1.7.10-0.2.0.39_beta
EnderIO-1.7.10-2.3.0.429_beta
Et_Futurum_Requiem-2.5.0-rc1
ForgeMultipart-1.7.10-1.2.0.345-universal
HardcoreEnderExpansion MC-1.7.10 v1.8.6
NotEnoughItems-2.3.83-GTNH
Thaumcraft-1.7.10-4.2.3.5

Additional Context (OPTIONAL)

There are exactly THREE mods that do this issue only when they are installed TOGETHER.
These mods are "Hardcore Ender Expansion", "Ender IO" and "Thaumcraft". If I remove ANY of these three mods - shulkers start spawning normally. Only when these three mods installed together that causes issue.

There is folder with these minimal mods and all configs (I didn't remove unused configs for mods I removed for testing)
https://drive.google.com/file/d/1lVmQXwsyRll5F6gLhT2gB5DYkvJ_GGJK/view?usp=drive_link

[Roadhog360]

Thanks, for narrowing this down, I will see what they are doing and if it's possible to fix on my end. I hope one of these mods isn't somehow deleting Shulkers from the spawn list

[GregoriusT]

Dumb question, how do Shulkers spawn in vanilla? Because I am pretty sure they dont spawn at all, they get worldgenerated and that is it. Apart from the whole getting hit by other Shulkers thing.

[xenoramos]

Dumb question, how do Shulkers spawn in vanilla? Because I am pretty sure they dont spawn at all, they get worldgenerated and that is it. Apart from the whole getting hit by other Shulkers thing.

As far as I know - yes, they only generate on End Citiess walls. But EFR uses different methods of spawn, since no End Cities are there.

[syndicate25]

This is not a fix, but a suggestion.

You could use a mod called "Just Another Spawner" to get around Vanilla spawning and configure it to your liking.

[Roadhog360]

I'm really late to investigating this 💀
Will look into it soon

[Roadhog360]

I think I found the issue: https://github.com/chylex/Hardcore-Ender-Expansion/blob/d962137c81eb5d48c05c6083e7700f2156d5b05d/src/main/java/chylex/hee/world/biome/BiomeGenHardcoreEnd.java#L21-L52

Consider trying the GTNH Version of HEE

I'm guessing that something about installing the other two mods changes load order, and thus causes the problem code to run after EFR, so the other two mods may not be the issue after all?