Sorry to hear of your loss.
I had a somewhat similar experience. I had a beautiful pair that were always out and about. The male started the mating ritual with the female, and they would dance just about every day, especially at night before the lights went out (yes, i'm sure it was the mating dance, and not aggression). The female was into it initially, then she went into hiding after a couple of weeks. She was found dead wedged into a rock a few weeks later. Ironically, the male jumped out of the tank and died about 2 months later.
Very underrated fish IMO...