We were exiting from Smithgall Woods State Park on the way to Helen, GA. The navigation route was to turn right and proceed on GA 75A S. But FSD abruptly turned off onto Duke's Hollow Road, a gated limited access road for cottage guests. Crazy. That's not the way to Helen!
Here's a longer video of the Tesla screen showing the incident in context. (After waiting for a pickup truck to pass, I manually backed out and returned to GA 75A S and turned FSD back on to reach the destination in Helen.