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Issue ID




[MAC]Cannot click on UI buttons when 2 Game tabs are simultaneously visible

Scene/Game View


To reproduce:
1. Open attached project ""
2. Open "K.unity" scene
3. Enter play mode
4. Click on the button in game window which displays Display 1

Expected result: button is clickable
Actual result: you can not click the button

Reproduced on: 5.4.1f1 5.5.0f3 5.6.0f3 5.6.1p1 2017.1.0b7 2017.1.0b8

Notes: this only happens on MAC. If you press button in the Display 2 game window after entering play mode, the button works, but clicking on Display 1 button, makes no buttons work again.

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