Maybe the regular pokeball wasn't enough to catch the pokemon? I don't know if I remember correctly but most bots are limited to 6 pokeballs on 1 pokemon.
Nah, it used to instantly catch them with regulars, even rattata's of 10-100 cp is getting away.
niantic admitted that their newest update generated a bug where pokemon escapes happen a lot more.
https://twitter.com/pokemongoapp/sta...01330967326720