What's going on with event chests this week?

What you were expecting to happen, and what actually happened?
I opened a bunch of Event chests (15). I expected to get troops from Leonis Empire only, instead I got only half of them from here (exactly 7/13, 2 chests dropped traitstones).

What are the steps to make it happen again?
Perhaps open some more Event chests?

Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!
Here you go

Bad news: That’s them working as designed.

Leonis Empire doesn’t have enough Ultra Rare (Or really even Epic) troops to fill the chest with enough variety by itself. To counter this, token extra troops are thrown in to balance things out better.