Last friday I was about to raid a Pinsir in cloudy weather. Auto select suggested to open with a double rock moves Aggron. I figured, “why not? It will save me potions, let’s give it a try”. Throughout the raid, I stared at Pinsir’s health bar and the clock back and forth. It was close, but probably doable. I had fire pokémon ready just in case, but as the fight went on it became very likely that Aggron would do it on it’s own, although quite close… That’s when I realised Aggron had barely lost a few HP… I starded to figure out something was wrong and feared the end… Alas, when the clock hit the 20 seconds left or so, Pinsir gained all it’s HP back… Ughhhhhhh… Of course I didn’t make it. In the second run I just rolled over Pinsir with Tyranitar and 2 Charizards in anger - Pinsir had to suffer.
Well, probably a network problem, but hell I would have liked to know it in less than 130 seconds… And yes, Aggron needed to be healed afterwards, not by much though.