Seems high to expect normal operation. I suspect a voltage spike on shut down may cause some items to disconnect temporarily.
I would ask your power company to come out and check for power issues. Could be a loose neutral in your supply or main panel.
For instance the PD converter manual says:
5. HIGH VOLTAGE PROTECTION All converters incorporate our patented High Voltage Shutdown circuitry. This feature automatically shuts the converter down to protect sensitive electronics in the event of high voltage transients on the AC power line, or if the RV generator regulator should momentarily fail. The converter will automatically return to normal operation when the high voltage transient is corrected.
