Exactly what mine does also. I turned it off and still does it. Like you said, it does it enough to be annoying but not consistent enough to be a mechanical issue.
So, I got mine back and they said it is a characteristic of the truck. They had me take a brand new 2022 with 10 miles on it (3.5 ecoboost) and I felt the same thing on the low rpm shudder like it's holding a gear too long. But I didn't get the same higher ram vibration/shudder that we are...
I'm currently at the dealership right now waiting. Took the tech for a test drive and he definitely felt this. He actually pointed it out multiple times. He mentioned he be curious if some of these 21s came with the 21B10 update as he said that's what it felt like to him. So I'll update once I...