Scenario: Main window with level open on monitor 1, content browser open on monitor 2.
If I dbl-click on say a blueprint in the content browser on the second monitor it will open the BP as expected in the main window as another tab but will then hide the content browser (and an other windows) from the second monitor.
This is a basic example, I usually have several windows open on the second monitor but if ANY other tab on the first monitor is selected (other than the first tab) then all second monitor tabs disappear. If I re-select the first tab on monitor 1 (the main level editor) then the previously hidden windows/tabs on monitor 2 re-appear.
This behaviour is not present in 4.7.x but is in 4.8
Branch: 4.8 Source from Github (up to and including CL 2516789)
My OS is Windows 10, the two monitors are different resolutions, Monitor 1 = 1920x1200, Monitor 2 = 1920x1080
Running projects from the launcher or running debug via VS2013 (F5) produces same result.
I realise this is pre-release but thought you may not be ware of it, assuming it’s not just my setup.