What you were expecting to happen, and what actually happened:
Usually these offer troops that I don’t have at Mythic level, so it’s strange that I would be offered this.
How often does this happen? When did it begin happening?
This is the first time i’ve seen this.
Steps to make it happen again
It’s been like this all day since those reset at daily reset time.
Remember there is more to these random offers than just the troop by itself, it usually contains resources (Souls, etc.) and/or Keys alongside it. Click on the “?” to list everything included in the offer.
Yeah, I get that. But this is the first time I’ve seen them offer a troop that is already ascended to Mythic for me. If they want my gems then they shouldn’t include them.
Guessing you don’t have 5 Forest of Thorns troops medalled to Elite Level Bronze?
If you don’t have that kingdom power level task completed, the game can give you this pointless offer. It is a ‘feature’ that has always existed. Devs have always insisted it is not a bug.