Editor crashed on exit game cilent

Hello,

I last hour I have experience 3 crashes reports from my editor. I have to send crash report then it will close everything. I have notice this happens when I am using experimental UMG. I am telling to use execute console command, to leave game client. When quit game is pressed. Is there another way to achieve same action without using that?

This is happening in version 4.4.2.
Computer is a Mac.

Thank you for your feedback.