Mine did this a couple times early on and I didn’t think too much of it. Was thinking along the same lines as you with the break-in. However I’m over 4,000 miles now and it did it again today.
I’m in San Diego. 9/30 build. 10/2 ship date. Got the shipped email on 10/4. Estimated arrival 11/5-11/11.
BUT the estimated transit days shows as 76 days, which I’m obviously hoping is wrong.
According to: https://www.bronco6g.com/forum/attachments/april-2021-abt-4698-bronco-accessory-part-number-price-list-pdf.118590/
the JBL sound bar is “(non-amplified)”.
If that’s the case, I would think that it ties into the factory stereo somehow, and is not just a standalone Bluetooth speaker.
Check the Quick Reference Guide.
https://www.bronco6g.com/2021-bronco-quick-reference-guide/
It lists what tranfer case options are available with each GOAT mode.
I haven't seen this video posted on here yet. Not my video, but popped up on my YouTube.
Some cool shots of the trail cam functionality that I hadn't seen before. And they get up to 70!!!