So is it just impossible to get away from softcore porn on Instagram?

I have a few instagram accounts. My main one is full of Japanese idols and my own interests.

And I have an alt dedicated to gunpla, figures and trading cards. For some reason, no matter how hard I try, half the timeline is full of big breasted girls taking their tops off or shaking their body. I try to purge it with the "not interested" button but it persists.

And I never have liked or saved any of those posts on the account. I wanted it to be primarily about my hobbies.