And still no answer to other question.
How to change now to regulatory setting?
Also, I see no mention of this in release changelog.
EDIT: it is in changelog, my error

Antenna gain should not be changed, especially for devices with built-in antennas. What were you trying to achieve anyway? If your signal is too weak, fix position or alignment. Playing with antenna gain is not the right way and can be illegal. I am fully aware of antenna gain setting that can be i...

bpwl,krafg - The antenna gain setting is not available there anymore for the routers that have a built-in antenna. Poorly decided and implemented. You have discriminated routers that have to weak antenna to begin with, case in point HAP AC2 vs HAP AC3 or Audience. So if your signal with HAP ac2 is ...

After update to this version, and some changing of wifi channels for testing, my mobile phone and tablet cannot connect automatically to wireless.
Hardware rb2011uias-2hnd-in.
Ros problem or something else?