Unlikely readings from Aqara temperature sensors after deCONZ restart

[JulioVargas]

Aqara WSDCGQ11LM
deCONZ 2.32.5

Reading values from PWA API with Zabbix.

If I restart deCONZ [because of issues with Home Assistant, see other threads], the temperatures jump around implausibly:

Every temperature has suddenly jumped. The pressure and humidity behave the same.
Is this likely to be a deCONZ issue, or is it the sensors?

[JulioVargas]

Odder still, in the PWA, Kitchen is showing as 14°C, which is higher than expected from the above trend, but Updated is from 6 days ago? Doesn’t make sense.

[Mimiix]

You need a new battery.