Items and shift + left click does not work. Also middle click does not work, either.

Put the summary of the bug you're having here

What I expected to happen was...:
Everything would be fine

What actually happened was...:
Out of the blue, Everything was buggy. The home screen,items,Shift + left click,and Middle click

Steps to Reproduce:
1.It just happened, and has been going on for several days.
2. ...
3. ...