Trapdoors closes when you click with the left mouse button. (win10)

I think trapdoors must close only when you click the right mouse button, but they close when you click with the left mouse button as well.
Steps to Reproduce:
1 - Place a trapdoor
2 - Aim for it.
3- Click and hold the left mouse button.
4. Ready. The trapdoor will open/close and start to break down. (it should just start to break);