Hey there! We're having a bit of a problem:
We're symbolizing by unique values and a couple of symbols weren't showing up in the legend.
Then we noticed that the feature count in the symbology pane says zero for these same values.
So, I had a mini-heart attack and checked to make sure the features are in fact in the SDE feature class.
They're all in there.
Any ideas why the count isn't showing up?
We ran into this issue and realized we had made schema changes while the data in SDE was registered as versioned. We unregistered the FC as versioned, compressed to Default, and then re-registered as versioned. Everything is working as expected now. I hope this helps someone out there!