Platform:
Samsung A71, Android
Video or screenshots:
What you were expecting to happen, and what actually happened:
I see that I have reached the maximum improvement and can no longer raise any troop to level 20 in the Karakot kingdom. But at the same time, in the collection, I see that a unit from this kingdom is level 18 and can be upgraded to level 20.
Steps to make it happen again
Open the kingdom menu, open the collection.
How often does this happen? When did it begin happening?
This has never happened before. I noticed the problem on Friday, when I opened a lot of chests and I had enough copies of this troop to improve.