After upgrading to Unity 5.4.1, the Game view in the Editor occasionally goes blank while testing. Seems to have a higher chance of happening when tabbing between Unity and other applications. Switching to the Scene view then back to the Game view fixes the problem. If I wait a bit before trying to switch to the Scene view, Unity sometimes hangs and needs to be restarted.
I’m using a Mac with El Capitan. Is this a known bug with Unity 5.4.1?