This had nothing to do with any kind of electronic interference...
Instead it was likely the weather conditions that first caused the "low vertical limit landings" due to iced up VPS sensors & then later the motor errors together with loss of...
After talking a few friends/family through the above questions, I decided to just write this up to give to people. Its not meant to go over every single difference between the different models, but rather be a guide for where they should start...
That is generally the case here too. I hadn't thought about that but I have told many people that when it's -40F it's never windy so thanks for bringing that up. Quite the oddity.