Is there a PVI in your profile view that is missing a label? I expected to have to dig down in to the land of styles to correct this issue. However the solution was actually very simple. Right click on one of your PVI labels and bring up properties.

Reduce the weeding value to zero. There’s your missing PVI label. I haven’t tracked the weeding value down in the styles yet. But I would expect most users will want their fg profile style to have a weeding factor of zero.