Tuning & timing problems are usually frequency, not current or voltage. I've had problems with digital load centers before and it almost always came down to:

A: An Ethernet back end similar to D-Link monitoring the outlets and reporting faults to the main panel or…

B: A noisy; switching or poorly isolated (common mode) power supply somewhere in the panel or load.

In both cases it showed up as AC noise superimposed on the line frequency and could be seen on an o-scope.

A lot of (most?) generators do not produced a pure synewave AC output. It's square, stepped or modified. They can also give line freq based clocks a problems. It's one of the things the better UPS and inverter systems are designed to prevent.

Phil-deux