Loose connections and low voltage high amp. Only time we've seen it is at the tower plug in. We were using a 30 amp pigtail adapter.The gauge in the house showed 105 volts or less. We had surge low voltage protector plus built in same.
I cut the gen on which broke the circuit to the tower, quickest way, I thought.
When I unplugged the cord it was melting and burned my hand.
I had cleaned the plug with contact cleaner before we hooked up to the tower.
Park had problems or maybe just the tower. We just used the generator the rest of the evening. We left in the morning not having to fool with unhooking in the am or take boards from under the jacks, since it was paved. This is the way RVing should be. :)