Sorry, I don't think I can help you regarding that issue. Seems to be something between your mailing app and mixplorer but I don't know Aquamail or the things it does to attach files.Exactly just what I meant.
I thought it was a problem related to mixplorer, but if you tell me this it means that the problem is related to water mail.
Another thing that often happens is to open email attachments with mixplorer.
Practically pressing the attachment button, without downloading, it sends the mixplorer loop and therefore does not open.
While it works well with other applications, for example if I use WPS office.
How can you explain this problem to me? Do you think it is the acquamail application that does not digest mixplorer well?
thanks for the technical support.
Maybe @HootanParsa , the developer of mixplorer is able to give you a hint, in that case post your problem in the mixplorer main thread https://forum.xda-developers.com/t/...d-fully-featured-file-manager.1523691//unread
Including a log by Mix itself (settings - send log) or by a log app like Matlog.