Books app automatically redownloads PDFs after I manually remove them

I have several PDFs uploaded to my iCloud library in the Books app. Most of them stay in the cloud, not downloaded to my devices. However, the few that I have downloaded and imported to the Adobe Acrobat app (to upload to the Adobe cloud and access on my Windows laptop) will automatically download themselves to both my iPhone and my iPad, despite the fact that I have pressed “Remove Download” on them several times on both devices. The downloads will be removed for a few minutes, but then they will redownload themselves again. The files have all been deleted from my Adobe cloud without issue, and as far as I know all “automatic download” settings are turned off for my Books app. How are they able to keep forcing downloads? I don’t want to choose “Delete Everywhere” because I need to keep the files in my cloud.