Why is this text black, not blue? It's locked and linked, like the rest.

I linked all of these values to the datacard of the model, and locked them in position.  The only black one is the .X one - why?  It does not matter as it has no effect, but I'd rather know what, exactly, is inconsistent with these fields.

SWX 2017 SP5

SolidworksDrawings And Detailing