OK, I found that worked most of the time, but not 100%. Specifically it didn’t work when I switched window to type a reply to you in here and then switched back. Go figure. I’ve raised a ticket and you should too.
This reminds me of an old joke:
Man: Doctor, whenever I move my arm like this it hurts
Doctor: Well don’t move your arm like that then
So I guess, for now, don’t press the TAB key…!