Command+Tab Bug

I use the mac client.

When I switch out of the client after opening it (command + tab or just simply clicking outside of the client), and then I start a game, it doesn't let me into the game. It just blinks in and out of the screen I was on previously and the game screen. Sometimes the game screen is totally white or totally black, but it just keeps blinking back and forth and makes the game totally unplayable. I've replicated this bug a few times already and have tried patching the client to no avail.

Is it just me or is this happening with other macs as well?