My Alt-Tab is now switching windows in a round robin fashion rather than between recent windows. So for example if I am in VS Code and Google Chrome, initially I would be able to switch between them using Alt-Tab irrespective of other windows. But now Alt-Tab goes to other windows rather than the last viewed window.
This change happened after a recent crash on my Windows 10.
In the multi tasking setting, "Pressing Alt-Tab shows shows windows that are open on" is set to "Only the desktop I'm using". I cannot find any other setting to modify the behavior.