Perspective Power Chart settings not "sticking"

Ignition 8.1.1.
I’m modifying a Power Chart to add in a fourth plot and new tag. As shown on the IU video, I’m doing some of the configuration in Preview mode and they’re showing up in the Properties view.
I then save the project and check in my browser and the changes aren’t coming through.

On a related note, the Y-axis labels don’t seem to want to appear on the plots 0 and 1 but do on plots 2 and 3.

Any ideas? Have we a bug here?