Steps to Reproduce the Bug

I've written a ghost ingredient handler for RS2 (on both Fabric and Forge, it uses the same code).

I'm noticing that on Forge, Target#accept is called sucessfully.
On Fabric, Target#accept is never called, even though I did drag it successfully onto the target.

Expected Behavior

Target#accept needs to be called properly on Fabric.

Actual Behavior

Target#accept isn't being called.

Mod Pack URL (Optional)

No response

Mod Pack Version (Optional)

No response

Extra Notes (Optional)

JEI v11.0.0.206, only on Fabric.

latest.log

No response

Thanks for reporting!
This has been fixed in the latest version, please let me know if you run into any other issues.

Is it fixed in version jei-1.19-fabric-11.0.0.222?
The ghost ingredient handler still never calls #accept.

https://github.com/refinedmods/refinedstorage2/blob/fix/177/ghost-ingredients/refinedstorage2-platform-fabric/src/main/java/com/refinedmods/refinedstorage2/platform/fabric/integration/jei/GhostIngredientHandler.java

I can see the blue placeholders, but as soon as I drag it onto it, nothing happens.

Oops, thanks for letting me know.
I checked that the ghost ingredient was treated as completed successfully, but didn't check that the target actually received the item. I was able to reproduce the issue as you described it.

This should be fixed in the next version, I was just calling the wrong method on mouse-up for Fabric.