What you were expecting to happen, and what actually happened?
I had some defences to do and went to change my home kingdom for another one (in hope for some good traistone drops), right after changing my home kingdom, the 2 defences I had left disappeared (they were less than 2 hours old)
What are the steps to make it happen again?
Wait to have at least one defence up, change home kingdom…
But maybe this is intended? I don’t know :o