Thema: Vu+ UNO 4K SE - SNR in dB

I have installed OpenATV 6.4, but in infobar, there is SNR shown in %. When I change this in "Menu / Settings / personalize / OSD settings / Page 2 / Change SNR % to dB" after restart nothing changed. How can I change this setting? This also not working on OpenATV 6.2 and 6.3.

Is always the same with Ultimo4k and will probably never change.