rb800 health Voltage

How is it possible that some RB800 show Voltage and the other not? We have about 5x rb800
800o.jpg

both have the same RouterOS and RouterBOOT versions?

Yes. There is another RB800 (see serial) and Voltage shows
800.jpg

Normis: What solution? Or we have a bad series RB800?

please email support with the supout.rif file from the device that is not showing it. we will check

Send to support.
Thanks

See date of first post. In 5.18 is fixed this problem