buying gems from Lilly shows available Currency in stash even though there is none

As the title says I wanted to buy gems from Lilly.
I just used all my Alterations so I had none in my stash or inventory.
Normally when you want to buy Items that you dont have the currency for it shows it in red text.
Now some gems show the text in white, when you try to buy it you get the error message "You dont have enough currency."

So it isnt a huge bug just a wrong display thingie.

Bug reference number 754.917.614

For reference: Visual-only. It corrects itself when you change zones.