There is a bug in the following scenario:
You have 2 windows visible on the screen slightly overlapping. WindowA has level set to 1 and WindowB has level set to 2. Now if you fadeOut() both windows at the same time, WindowB will pop right back up, even though there was no call to display it again.
However, the bug only seems to appear when you open WindowB first.

The bug does not appear when both windows have their levels set to 1.

The reason I did this was to have WindowB always appear on top of WindowA for visual reasons.

Can you please attach a small 2.0 project with code to reproduce this issue?
Thank you

Here you go.
Click the button to close both windows. Window2 will reappear right after.
If you change its level to 1, this doesn't happen.

Thank you for submitting the test project.

I've investigated it:

the issue is that normally when window gets closed, then the focus switches to the next one (it's being activated), like on Windows OS.

I'll update the codes to ignore windows that are currently fading out as well.