I've been having this problem almost since the beginning of my time with the VeraLite, now about 4 years ago:
Sometimes, when I switch off a wall plug in Vera, the plug makes a slight 'tick'-noise and the status led on the plug switches off, as does the status in the Vera Dashboard.
But the device that is plugged into the plug remains powered.
The 'tick'-noise on a different switch that does disconnect the power is a little bit louder, indicating to me that something more switches physically in that case.
I've had this happen with Fibaro, Everspring and Greenwave wall plugs. Sometimes I turn the device on and off a couple of times and it works again, other times I never seem to be able to get it working again. I've already thrown away some wall plugs because of this issue, others I've replaced but the replacements eventually have the same symptoms.
Starting this evening my Greenwave Powernode 6 joined the club, but only one port out of six. I've reconfigured the node, disconnected and reconnected it and restarted the Vera, only plug number 2 keeps doing this, the other 5 work fine. But of course it is possible that everything works again tomorrow.
I'm getting really tired of this issue and don't know what to do to fix this, or to even get a clue of what is happening.
Is there a log somewhere, or a way I can create one, of the commands and responses that Vera sends and receives? Or does someone know a better way to diagnose and fix this?