Some months ago I noticed alt-tab was not always working properly. It often only lets me select from a couple of the apps, as if it's unaware there are others running. I assume something else is interfering with it working but an internet search has not revealed anything useful.
After a reboot it will work for some time before the bad behavior reappears.
Anyone seen and solved this issue?
Solution: I reset the defaults in Nexus Ultimate and the problem disappeared. I changed back only the few settings I wanted and it still works.