Battery level is blank after some hourly uploads

When the battery status and RSSI are reset at midnight (UTC) they might not show a battery level. To prevent this from happening, add an extra connection after midnight (UTC) and it will be corrected in the next connection.

Why is the battery level blank after some hourly uploads?

The status for battery and RSSI are reset at midnight (UTC) and sometimes the update of them may go wrong at the first connection after that.

If your C22 have few connections, you may do one extra just after midnight (UTC) so it will be corrected in the next connection.

New York has time zone -5h (-4h) which does that UTC midnight occur at 19:00 (20:00) New York time and if you put an extra connection at 21:00 (then you also have included the change for daylight saving) you may have a correct status at 22:00.

Norway has time zone +1h (+2h) which does that UTC midnight occur at 01:00 (02:00) local time and if you put an extra connection at 03:00 (then you also have included the change for daylight saving) you may have a correct status at 06:00.