Tvheadend

Hello.

I have a question.

1. Once in old TVHeadend versions SNR was shown as (progress bar%). Now the SNR bar is in dB. Is there a way to change this bar to the old progress bar in%?

2. In TVHeadend (http), the status option is 68% signal quality. In the kodi menu, the signal quality and SNR is 0%. After about 15 minutes, the signal quality appears at 70%. Then, as I switch channels, I can see the quality of the signal everywhere.
What happens that LibreELEC is unable to receive information from TVHeadend for about 15 minutes?
Of course, at the time TV works.

3. Why is the SNR bar always empty?
Thanks,