Using Android app and uploading a PDF file, when I go to view the PDF it's slow AF???

Next

I'd hit the back button, go to open another pdf and it's just blank screen, slow AF..

Then I'd go back to the first upload pdf, and it says "downloading" again, then nothing....

To be honest, I didn't have the patience to wait and see if they would finally load.

Does this happen to anyone else?