Pushed an update that aims to fix the random appearing of the UI and it'll only work on the inventory as before.
As for the keybind key, don't know what keybinds other mods have that people use, that's why I made it configurable. You may go into settings > controls and scroll down until you find the Mods Category and the Trash Slot subcategory where you'll be able to rebind the keybind to whatever you like.