Just curious, have you reached out to them about your previous ticket? Did they ever send you any update? Edit: I was mixed up, it was @thn80 that opened the ticket (see this post) And the was using hap ax lite, not hEX.
When I reported a problem with CSS106-5G-1S (in 2017?) I got a message and a test version before it was put into a firmware update.
Not sure if the procedure has changed.
Perhaps you should at least make a comment in the v7.11rc is released! thread with the test you did, and why you don’t think it is fixed.