Logs reporting "invalid date/time" for power readings on one switch

[asheville]

I've never seen this before. I recently added this Z-wave plug (yes, configure pressed), and when it reports power consumption -- I see "invalid date/time" in the logs.

Note -- sometimes it reports property -- other times it's doing the "Invalid Date/Time"

SYSTEM - GuestB Oil Heater Plug (and is the same make/mode as the "MBath" plug - which doesn't have the issue)

It's a " Minoston Z-Wave Outdoor Plug with Energy Monitoring (MP22ZP)" -- with the built-in "Minostron Mini Power Meter Plug" device type.

[asheville]

Gonna close this one as either (a) reboot fixed it, or (b) updating Hubitat OS fixed it. Not sure which.