I had the same problem. My mobile repair guy diagnosed it as a half shaft problem. He ultimately jacked up the truck and was able to reproduce the effect by wiggling the wheel. Since I live so far from the SC, he was able to replace them in my driveway.
I had a second cracked windshield in 6 months. The first one, since only Rivian could recalibrate the safety features, I went with the Rivian SC for replacement. This involved a 4 hour drive one way, thus was an long day of travelling and waiting around and an $1800+ bill. The second time...
I am swapping out my 21" wheels for the 20". What did everyone else do with the old wheels? Is there enough of a market to try to sell them? Or is it something you end up getting stuck with.
I didn't pay attention to the time. You definitely save on cost. Drilling holes for the pop rivets will take a little time. I used my drill press of which I made a jig that made it go faster.
BTW I added end caps for the panel next to the gate as it would occasionally catch and keep the gate from closing. See attached pic. I used Gorilla Glue to attach it.
I am not sure they could help you as it was my design and I had them prepare the panels to my specs, they never saw the finished product so I doubt they fully understood what it was for. I used a local outfit named All Metals Welding and Fab Co. Any sheet metal fabrication shop should do.
I have the same problem. I don't know if using the garage door opener causes it or not, but have found that if I step out shut the door then get back in it responds normally.