Attempted to use your mod to play split screen

However, whenever player two, using a controller, attempts to pick up an item in inventory, it attaches to the actual mouse instead of the virtual mouse

Have attempted with or without your mod on the keyboard screen, same result.

if you change cursor type to console you can see where the virtual cursor is, and still move items.

Do you have Optifine installed?

I am experiencing this same issue using version 0.6.1 on 1.12.2. I have optifine installed, is there a fix, or is that a conflict?

Edit

Turning off virtual mouse inside controllable settings fixes this issue.

This should be fixed in recent versions (0.10.1). Optifine patched the same class I was modifying but now I use Mixins and it allows me to patch with Optifine still working.