Warlord Shen model glitched on Howling Abyss/Twisted Treeline (pics)
I imagine it applies to every other chroma as well
The glitch is that the flag on his back has strange black markings that aren't supposed to be there.
It is less noticeable on Twisted Treeline, but it is also glitched there:
For reference of what it is supposed to look like:
I assume the problem is just that the different maps have different lightings.