Yeah, I was just looking at that.
Sometimes I open the file and right-click that part and the faded ground seed text is not clicked - most of the time -, and other times it is ticked - rare -.
I vaguely remember having a problem a while back where I was having trouble setting ground seeds reliability, but I gave up on it because I don't use GND fill on my projects.
You can go Routing/Ground Fill/Choose Ground Fill seeds and click on GND, and it shows you all the GND seeds.
You can also click the text in the bottom red bar.
You can also check the gerbers and output pics that they are actually there by looking at the drawing.
EDIT
I got the GND seeds back. I added a resistor to the PCB view and set one pin to GND seeds, and all came back.
From memory I think it was fine with small numbers of components, but this one with lots of components and it was unreliable.