I've had a similar problem, but with alt+`. Switch between two windows quickly, and sometimes they don't switch, sometimes they will lose focus in the switch.
Another weird issue I've noticed:
* Open 2 Terminal windows
* Hold alt+` until the window previews appear
* Keep holding the key combination and after a few seconds, the window previews will swap positions (so if I try to swap windows quickly, I will select the wrong one)
I've had a similar problem, but with alt+`. Switch between two windows quickly, and sometimes they don't switch, sometimes they will lose focus in the switch.
Another weird issue I've noticed:
* Open 2 Terminal windows
* Hold alt+` until the window previews appear
* Keep holding the key combination and after a few seconds, the window previews will swap positions (so if I try to swap windows quickly, I will select the wrong one)