In my case, right clicking on macbook pro (i.e. clicking with two fingers) will cause the context menus to flash then disappear in a blink. So it's almost impossible to access the context menu with the right click. The only work around is to press control then left click (^ + left click). But still it is annoying to always have to press control.
Here's a video of the right click issue: https://streamable.com/qtn9z
OS: MacOS High Sierra 10.13.3 (17D102)
Macbook Pro 2017
MATLAB: Matlab 2017b