Fabric loader: 0.15.10
Game version: 1.20.4
Running with mods:

Everytime I try to enable enhanced chests or enhanced shulker boxes or both at the same time, it will just disable itself after clicking apply. I'm not sure why this is happening, would love some insight into this.

Hey !

If you look at your logs (I assume you are using MultiMC) you can see that it says that Entity Model Features is overriding the configs, hence the toggles not working.

You should be able to disable the chests and shulkerboxes override in the configs of Entity Model Features, but I didn't find the exact config that you need to change. I suggest you to disable Entity Model Features and Entity Texture Features while I am searching for this config, so you can still benefit from Enhanced Block Entities !

I'll keep you updated if I find what you need to disable in order to still be able to use EMF and ETF.

Best Regards.

alright! thank you so much and I await more info!!

Hey !
I found the setting ! (I don't know how I didn't see it yesterday)
Go to your Entity Model Features configs (you can access it through Mod Menu), then go to Models, Options & Fixes, and turn off the third toggle "Enhanced Block Entities (EBE) Mod patch".

Once you've done that, you should be able to toggle on Enhanced Chests and Enhanced Shulker Boxes in the Block Entity Settings of Enhanced Block Entities !

Hope it works for you ! If so, I let you tag this issue as Solved (or Closed, I can't remember how it works on GitHub) !

Have a nice day !