Hi, Just wanted to add that this same false start/ engine shuddering/ vibrating issue has happened to our vehicle. It's 2018 Armada platinum, first owners. First noticed in June 2021, around 53,000 miles. Since then it's randomly occurred two more times at different times of day (once was late evening, in hot Louisiana weather, other time was early morning). Each of the 3 random occurrences, my idiot self cannot seem to get my phone video rolling, so I can't record it! SO GLAD to see we're not the only ones have nearly identical symptoms.