Platform, device version and operating system:
Steam, Windows 7 x64
Screenshot or image:
What you were expecting to happen, and what actually happened:
I seem to have 204 Green Crystals, yet the 300 reward is ticked. Hmm.
How often does this happen? When did it begin happening?
First time. Going into the Guild menu fixed the display. Might be connected to the guild chest level and emblem colour bug! 
Just maybe… whatever caused the guild chest level issue might have affected a whole bunch of subtle things. Might have needed more than a band-aid. (Just a thought.)
Was this a once-off bug or has it been a consistent issue? Does it only happen after doing a particular game mode?
I’ll let you know if it happens again after a “tribute pause”.