Google Pixel 2, current OS

There seems to be an issue with summoning using basic mystery shards. I've repeatedly had the color for a rare come up, only to have an uncommon elf unit pop out instead. Twice it was the Jaeger, and once it was the Elfguard spear girl. 

Now, I have no idea if it's the wrong rarity or a color mismatch, but something's going on, and it should be pretty easy to reproduce. 

Hope this helps. :)