Thanks for reaching out. I am assuming you are trying to scroll document pages while the Place window is open. This is an expected behaviour on all Adobe applications. When the any pop up windows like Save/ Place/ Export is open, you can not scroll the document in background.
I understand your frustration, Nathan. I have passed on this feedback to our Product team and would request if you could also post it on our UserVoice page and share the link here, so that we have a significant number of votes for this feature request.