... messages that one or more (random) cameras are "blocked"
I get this rarely, but it's usually early morning when it's very humid/rainy/foggy, probably a layer of dew on the lens. It goes away when (presumably) the dew evaporates.
If you get braking at, or around, certain locations, make sure you record it (scroll button "
bug report - phantom braking") and record the dash cam (you'll have to email the video to them).
This will help service record the incident(s), they'll pass it on to engineering.
I'll be cruising at 75 and it decides to change the set speed to 60mph for a few hundred feet
Are you sure there's not a speed limit sign that the car is seeing, but you're not?
Random wild guess...if the road merges, is it possible the car thinks ... you're no longer on 495, you're now on 270...but since it only knows the speed limit on 495 and it hasn't seen a speed limit sign for the
new road (270), it defaults to a lower highway speed, waiting to see a new sign alerting it to the new road's speed limit... (if that makes any sense).
How would car know the speed limit on a new road before seeing a sign?
Again, just a guess, but if this is a regular occurrence, I'd bet it has something to do with the road
change