Platform, device version and operating system:
Screenshot or image:
What you were expecting to happen, and what actually happened:
I was expecting to receive troops exlusive to the Grosh-Nak Invasion event.
What happened was that I received a Blackhawk troop, First Mate Axelubber.
How often does this happen? When did it begin happening?
This happens every time I have bought Tier 5 in the Invasion Shop this week.
Steps to make it happen again
I cannot state whether this happens at other tiers so I can only suggest buying Tier 5 in the Invasion Shop.