[BRLTTY] orca vs text console Braille focus

[Stéphane Doyon]

When I switch away from X with orca back to a text console, my display keeps 
showing the Braille text from orca.
Some of the key bindings like line up/down work as normal and the speech driver 
says the text from the text console, but the Braille doesn't update.
Some bindings like HOME do not work, and sometimes cause orca to say something 
(though not always and I forget what exactly).
If I kill orca, immediately the Braille updates to text from the text console.

I'm getting this right after an upgrade of Ubuntu LTS from 18.04 to 22.04. Tried 
building brltty and orca from head.

What's going on? Any hints appreciated as to how to debug this.
Thanks