The document looks fine in the browser... this has started about three months ago and happens on iPad and android versions.
Could you please elaborate the issue you are experiencing.
Are you trying to open the PDF from a particular website? If yes, please let us know website address.
Do you experience this issue with the files opening from this website or it is an issue with all the files?
Could you please confirm the dot version of Adobe Acrobat Reader and OS installed on your system.