Minecrsft v1.14.4
Forge v28.1.90
Trash Slot v10.4.7
JEI v6.0.0.25

If the Trash Slot overlaps the JEI item list, the item list doesn't move around it to prevent overlap.

I also realized recently that if the Recipe Book is opened while the trash slot is placed to the left of the inventory, the trash slot will render behind the Recipe Book GUI, while the trash can outline will render in front of it.