I never had any problems using a bot. Even on a 2.2mil account liking 1k pictures a day. As long as you're doing it like they think you're doing it by hand you're fine. (Stopping the bot for some times, doing some active, some not that active sessions, don't stop using your account on your phone doing likes/comments manually, ...) What I've learned is that you have to find out for yourself what works best.