There are many reasons that Instagram can deactivate accounts and most of the time they violate some of Instagram's community guidelines. There's more information on those guidelines here: https://help.instagram.com/477434105621119
While we've had customers banned from Instagram, they were violating Instagram's Community Guidelines (e.g. selling drug paraphernalia, posting nudity). This was unrelated to using automation.
However, we've heard that you could be banned for using automation. Automation violates Instagram's terms of service so there's risk to your account using it.