Yikes, it's a real problem when there's instability in the system. Sure I understand why they did it, but ya put in a lot of effort shuffling cards around, renting extra cards to support your teams and then finally playing out the fray and BOOM! You choose that exact moment to complete your battles as the system has a HICCUP and BAM! You flee for no fault of your own.
RESULT: It was a waste of your time, energy and resources.
I'm sorry this happened to you. But if it makes you feel better you are not alone.