Bug: fighting the wrong team

Platform, device version and operating system:
Screenshot or image:

What you were expecting to happen, and what actually happened:
Get to team selection screen of guild raid boss
Click edit team
Go to classes and choose a class you don’t have
Click show me and start a challenge at that kingdom
The fight will be between your default team and raid boss team.

How often does this happen? When did it begin happening?
Just noticed it, able to reproduce

Steps to make it happen again
See above