How to recreate moving defender bug

Glenghis
Glenghis Posts: 14 Just Dropped In
This happened to me on multiple occasions.
During the RatC event 3.2.
AI casts any creature
Player casts Moon
...
AI casts Heart of Kiran
Player casts Claustrophobia (trapping HoK)
...
AI casts creature
Player casts frog
Heart of Kiran & Moon swap places.

This is repeatable so should be easier to find.