Short version: Alt-tab to switch between windows seems to "remember" where you left off last time you alt-tabbed.

Ok, what the heck am I talking about? :)

Say I have 5 applications open:
A B C D E

I'm in Application A, and press alt-tab and continue holding alt.

I see:
A (B) C D E

where "B" has the box around it.

I release Alt, and now B has focus.

So far so good - this is how Windows works without DisplayFusion running.

Here's the bug:

If I press Alt-tab again and hold Alt, I see:

A B (C) D E

Normally, in Windows without DisplayFusion, I would see:

B (A) C D E

That is, the app that has focus is first, and the next app should be 'selected'.

With Beta 5, though, it:
1) Doesn't switch applications (I.e. "B" and "A" switching when I alt-tab between them, and
2) It picks up where it left off last time

I alt-tab often to switch back and forth between windows. Not being able to quickly toggle between two windows breaks my workflow, so I've gone back to Beta 4, and the problem goes away. It's strictly a Beta 5 thing.

I have the exact same issue on Windows 10

Same here, I had to go back to Beta 4 because of this issue.

@Owen Updated to Beta 6. Everything seems fine for now.