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I mean the email. Apparently it is a known issue for some people on the Android client. I tend not to use the client to send, but my partner does regularly. Out of every three messages, at least one is missing data at the end of the message. It does not seem to be device specific.
Well that would be frustrating. I haven't experienced that. But two things that may ne somewhat related.
If I preview a mail and reply, then if the original message did not finish downloading content then it seems temprarily unavailable in my reply. Which I have had same issue in MS Outlook, fairmail etc.
Occasionally hitting reply takes sometime for email chain text to load. initally it appeara missing but show up as I type.
And obviously if I don't hit load remote content that content is not available.
It is possible it is device related?
Did you try Beta App that may have fixes?
We did try the beta app, a few times. Generally we notice it on the other end; the recipient (especially one external to Proton) gets a truncatesd message or rarely, an empty one. I am 90% certain it has to do with the way Proton saves drafts before sending; I'd bet that it is not verifying the displayed version (user's version) against the last draft.
Very strange. I've used Proton roughly as long as you have, and have never had any of these issues with the Android client. I send emails from my phone all the time, even important ones.
Regardless, Proton acknowledges the issue:
Not exactly a stellar reply, given that their business revolves around their email offering.