When attaching a document in android and sending the message in the app, the document is renamed by the app using the stored path on android. E.g.: test.pdf saved in “downloads” is renamed to “primary%3ADownload%2FTest.pdf” by the app.
I would appreciate it, if the app took the original filename when sending a mail with attachments.
We have a version available which should fix the issue. This version will be published soon. If you want to download the version for testing, you can register as a beta tester