Added reverse hotkey setting (defaults to none).
Jitteriness has also been addressed.
New release available on GitHub. Please set the forward shortcut again too.
Just wanted to note that today I found myself using both directions of the shortcut between terminal windows and was genuinely delighted to be reminded that it's working properly again after a decade and a half!
Outstanding! Thank you. I was noticing how I'm having to retrain myself to make this shortcut a first-class tool now that it's working reliably. I didn't realize how much I'd conditioned myself to avoid it. It's nice having this workflow back.