Platform, device version and operating system:
Steam, Windows 7 x64
Screenshot or image:
What you were expecting to happen, and what actually happened:
Definitely expecting to see Mythics, Legendaries and Epics available in those odds!
Not spending any Seals until we’re sure this is just visual.
How often does this happen? When did it begin happening?
Started right now. (Restarting makes no difference.)
Can confirm. Earlier odds were being reported correctly. Currently not.
However, I just drew an ultra-rare troop from a guild key. So it’s cosmetic only.
Definitely looks like an issue with the stage-based nature of Guild Keys.
also I believe that since there’s a lower traitstone chance, there’s a higher overall chance of Mythics than in Gem Keys, at least at Tier 6.
Thanks. I was hoping, but didn’t dare.
And yeah, Level 5 seemed okay, from memory. I wonder if they forgot about the previous Guild Chest Level bug, just a couple of months ago, and made the same mistake again!!! 
See also Incorrect chest loot table.
Here you go. 
