Many thanks for the greeting!

In these instances, I'm usually killing 100+ enemy with my cannons, so casualty causing isn't a problem. The end result of me ending the battle is that I'm handed a clear defeat with severe casualties, despite no other troops leaving the walls. I do keep the city or castle.

I'll try and re-create this and post some screen shots. Never had this happen before until I was just going through an English campaign and it occures 7 or 8 times out of maybe 25 sallies?