Right Click Issues - OSX - Trackpad

Two-finger tap (right click) is not functioning properly.

In the crafting window normally a two-finger tap would halve a stack or place one block of a stack that I have picked up.

Now when I attempt to use a two-finger tap, nothing happens. Nothing at all.

Steps to Reproduce:
1. Open survival world (I have tried a preexisting world and creating a new one)
2. Open crafting window
3. Attempt to right click