I realise that you mention you’ve been actively using filters to target your audience. I must admit that I too have had similar issues. But this has nothing to do with any specific automation tool.
I experienced this when my accounts where shadowbanned og when I was blocked to do a specific action for some time. I personally believe it’s due to low trustscore of that specific account. It’s like if it once gets “flagged” as a spam account, you kind of have to work your way up. What I did was, I rested the account totally from automation for a period. Also when you state this:
Only doing follow unfollow is not human like behaviour in my opinion. You gotta mix it up. Liking, viewing stories etc. Right now it might be difficult, but remember all your actions when doing automation shall look as human as possible.
Rest the account from automation for a while, but still keep being active. Keep posting quality content both as post and a story. You will realise that your story views will start increasing bit by bit, as your trustscore also increases on IG.
This helped me. And again I can ensure you that this problem has nothing to do with any specific automation tool, but only your settings.