Operating system: Windows 10
Broken: last 2.81alpha build in my PC
I have trying the new file browser when I see that If I open some old scene with two windows layout, for example a secondary UV editor, and try to open a new archirve, or save the actual file. Blender changes the size of the secondary window, blocks for a long time (10-20seconds) and then it create the file browser window.
If I don't have any other windows only blocks.