UE4 freeze when go out of the editor

Hi, since I use Unreal Engine 4 on my computer (last time was on other computer 2 years ago), the editor freeze often when I go out of the editor (using the button for going on desktop for exemple or when going on other app like firefox, chrome, calculator, windows media player, this is very annoying that I have to restart the editor 5/6 time each days… Sometime I lost some changes that I haven’t saved…

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks