Track view doesn't follow playback

Ardour has suddenly stopped automatically moving the track view to follow playback. I have ZERO idea of what I might have done. I haven’t intentionally done anything to do this. The only thing I did between when this worked and when it didn’t was create a layered-region track and move a couple of regions into it. This can’t possibly have anything to do with automatically moving the track view ahead during playback, can it?

After posting the above, I noticed my version of Ardour was a bit behind. I updated from 3.0.rc3 to 3.5.100, as well as made sure JACK and qjackctl were updated. Nice improvements to Ardour, but the view is still not tracking playback.

That did it. Thanks!