This seems to work as advertised, i.e 1 shortcut action per switch. The window switcher appears when I hit the Tab key with the next app hilited and dissappears when I release the Alt key. Then the focus switches to the other application.
So if I understood correctly in your case the window appears with the current hilited and you need to press an additional time on the tab to move it to the other application?
I cannot replicate the issue you're describing.
verified that I have the same version as you :
➜ ~ dpkg -l | grep ' unity '
dpkg -l | grep ' unity '
ii unity 5.14.0-0ubuntu Interface designed for efficiency of space a
➜ ~
I have chrome and emacs open
Alt-Tab --> emacs
Alt-Tab --> chrome
Alt-Tab --> emacs
Alt-Tab --> chrome
This seems to work as advertised, i.e 1 shortcut action per switch. The window switcher appears when I hit the Tab key with the next app hilited and dissappears when I release the Alt key. Then the focus switches to the other application.
So if I understood correctly in your case the window appears with the current hilited and you need to press an additional time on the tab to move it to the other application?