Platform, device version and operating system:
What you were expecting to happen, and what actually happened:
I was expecting to be able to retreat in ranked PvP while the AI turn is active. Unfortunately, this no longer seems to be possible as of update 4.6, the Retreat button is grayed out until it is your own turn again.
How often does this happen? When did it begin happening?
Every time since update 4.6.
Steps to make it happen again
Play ranked PvP, try to leave the battle while a loop team keeps on looping.