Well, I had to go for a drive this morning. Everything worked fine. Shut the engine off for about 5 minute and then when I returned home, I noticed the traffic was not showing on the Navigation screen. Sure enough, the same 21020 issues with Travel Link and SiriusXM are back.
What a POS this vehicle is. I swear, this is part of why Lincoln has offered to buy back this thing. I was thinking I would get a 2022 Navigator assuming it will have Sync 4, but Sync 4 is probably just as crappy as Sync 3, so I guess it may be time to start looking at other makes.
Ford just can't get it together with this crap. Yes, Ford. Lincoln is hamstrung and will not be able to ever keep up with Cadillac or the others. I finally realize that now.
Oh well...you and the guys on the other forum were, unfortunately, correct. Time to move on.