App crashes - Proton Drive / AOSP Files

I have the following issue with the PDF Viewer app. Would anybody be able to see if they can reproduce it?

PDF Viewer app crashes when trying to open PDF file saved in Proton Drive from the AOSP Files app

PDF Viewer app displays contents of PDF file

PDF Viewer app works as expected outside Proton Drive
MuPDF app works correctly. It opens PDF file from Proton Drive from AOSP Files app

I can reproduce the issue on my phone as well. Any news about a future fix?

Also able to reproduce this issue.
Perhaps it has to do with files stored in the cloud. Could other users try other cloud providers?

Lusca Good suggestion to try with another cloud provider.

I repeated the exact same steps above but for Google Drive rather than Proton Drive. I could open a PDF file with no issue, and no crashing.

So it seems to be a Proton Drive issue.

Is anybody able to test Proton Drive on stock android OS?