Instant Retrain Blessing Update
We're working on a solution for players who have repeated issues retraining troops. If you're not encountering any problems while using the Instant Retrain Blessing, feel free to continue using the Instant Retrain Blessing. However, if you are still experiencing issues retraining troops and have used an Instant Retrain Blessing, please reach out to CS.
As it happens in attempting the replay feature again yesterday, it is now working for me. I am running Build 01-01-036-016_220.127.116.11.141211.cab3ba0, though I am certain how this compares to five days ago (as I didn't think to check... d'oh!)