Game minimizes itself when it goes out of focus in fullscreen mode

Steps to Reproduce:

• Launch Minecraft on one screen and notepad on second screen
• Make Minecraft fullscreen using F11 key
• Try typing something in a notepad

What I expected to happen:

Minecraft will still run in fullscreen, and won't minimize itself

What actually happened:

**Minecraft mimized itself to a taskbar

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By focus I mean currently active window
This bug does not allow for multitasking (Play Minecraft on one screen and replying to friends on second screen)