Minecraft Version

1.21.0

What happened?

Whenever Backslot is installed you can't click and drop the Elytra into the Elytra slot. However you can shift click it into the slot but it crashes the world and asks to return to the main menu. If you do so you can come back into the world and have the Elytra on, however you can't take it off as there is no registered item in the slot and is therefore impossible to take off. The slot itself will show up but a visual bug is that there is no icon at all within the slot frame.

How do you trigger this bug?

1. Install Backslot
2. Load up game & put on Elytra by shift-clicking

...

Loader

Fabric

Loader Version

Fabric 0.16.3

API Version

FabricAPI 0.102.0

Mod Version

9.0.0

Relevant Log Outputs

No response

I'm unable to reproduce this. Loading up BackSlot and this mod together with its dependencies, I'm able to place and use the elytra as expected in the Cape slot. Have you tested this with only these mods installed? If not, this could be a mod conflict with something else in your environment.

I can confirm this for 1.20.1, the issue still seems present at least in Fabric 0.16.12. I tested with just those two mods and dependencies (trinkets and cloth config API). EDIT: The mod versions don't seem to make a difference.

EDIT 2: Using Trinkets Compat Layer for Accessories instead of Trinkets resolves the issue, but it's far less lightweight a vanilla feeling than Trinkets, so a long-term solution would still be nice). However, I don't know if this is something you can fix or if it's something Trinkets would need to fix.