I am having a similar problem with Z-Wave Plus Aeotec Radiator Thermostat.
Problem may only have arisen in Indigo 7.5 (certainly only arisen recently in this form although had other problems with these valves)
Valve works well for a while, but nonce battery level stuck at 5% syncing is the only way to get the device to correctly report the battery level again.
Having a potentially related problem with Heltun Qunito devices.
These are brilliant devices in many respects, despite not being specifically defined yet within indigo, except that I keep finding switches 2-5 stop working (e.g. indigo reports switches 2-5 do not support turnon command - switch 1 keep working) and the only solution is to resync the device again.
As I have been moving these devices around a bit as well, it is possible that the problem occurs after the device has been unpowered and powered up again, but not yet sure.
So two questions: -
1) is there a way of re-syncing using a python script (so I don't have to log in to the server), and
2) has Indigo 7.5 introduced a way indigo can 'forget' some of the details of a device, or is this problem more likely the device end?
Both of these are relatively new devices - is there a general issue with more complex devices?
Quite happy to provide more details as the problem re-occurs [no doubt it will
] if this would help.
Z-wave system with 80+ devices, Indigo7 on a dedicated MacMini
Controlling lighting, heating, hotwater, security; but still a lot to learn ...