PDF resolution exceeds the limitation of 8192x4096 pixels

uploading (or drag and drop) a PDF onto a project board which I have done many times before and suddenly I am unable to as the message I get is the size is too large . The PDF's are approximately 400 to 460kb but pixels are too large.This is impacting on getting an image that is crisp for teams to collaborate on. I have used other work arounds but they are not as good quality or takes far too long to do.   MIRO needs to be able to handle PDF uploads of a larger size - too limiting