My mail app refuses to download attachments - when i tap on the attachment it indicates to load and shows download completed - what I tap again to open it shows a white site with "plain text ..." doesn't matter if it was a doc, a pdf, a pic, ...

In documents app nothing shows up - after that it shows "download failed" in Mail app and the attachment is greyed out ...

If I now choose "forwarding" for the mail it asks "should the attachments be downloaded" and if I agree it works and they are shown afterwards in the documents app

any ideas? - happens to both of my accounts (not really sure since when - i know it worked sometimes) both are EAS - didn't try it with IMAP