My R1S has been doing this also, it’s like a short flash followed by a long flash every 8-10 seconds. I added it to my upcoming service ticket I have for moisture in the rear light bar.
I voted yes on R1S gen1 quad. Purchased new 2023. Only one issue, non driving, air compressor would not air up to specified pressure. 24k miles, no 12v battery issue, however, Rivian is proactively replacing it next week
Anyone else using an adapter been getting the credit card error when trying to do plug n charge? I been using the adapter for a couple of weeks and plug n charge worked great. Ever since I got the email to reserve an adapter from Rivian it won’t do it. I can still charge using the Tesla app...