Mew JUMPED OUT of the Pokeballs twice...

Originally, I disabled my camera function on PoGO. So when Mew appeared, I was told that I needed to enable it and was taken to the Mew capture screen without AR. Naturally I was not allowed to throw any balls at him.

So I went to setting and enabled the camera, the game then restarted itself. I entered the capture screen again and AR still somehow wasn't on. So I closed the game and opened it again. This time AR is working.

Then the strange thing appeared. It JUMPED OUT twice of the ball before I was literally 3rd time lucky and caught it.

I suspect it has to do with the fact that I couldn't finish the mission the first two times? Does anyone have similar experience? I don't know if the IVs is affected or changed, but I got 1307 91% which I consider myself to be quite lucky!