I have seen a load of z-wave responded with busy messages and devices not reported in. What I just noticed is that most of my devices are powered but the option to repair them has disappeared. It only runs on the ones that currently have the option.
Never seen it think a powered device is a battery device before
There wouldn't be much if anything in the engineering logs. The engineering logs mostly cover hardware related issues, with some errors hitting the platform at large. Mind sharing some screenshots of what you see?
When the radio reports "busy messages" the environment is volatile and things will go haywire. Stopping devices from flooding the radio is likely the solution. I have seen countless reports of hubs struggling to cope with devices powered by USB that otherwise should be battery operated, especially Aeotec devices. The best thing you can do, is include them with batteries then switch to USB. But not even that is bullet proof. Best not to use sensors as repeaters. Also, make sure your Aetec devices run latest firmware. Some older versions are really buggy.