I can't find this symptom in forum.
I am using AquaMail 1.6.1.3 and Firefox 44.0.2, both on Android Tablet. Actually, same problem occurs when using Firefox on PC. I keep gmail open in Firefox browser on desktop to send/receive mail while working on desktop, e.g., compute-intensive graphics, etc.
I find that if I delete an email on the web (mail.Google.com), it doesn't get deleted in AquaMail, even if I refresh. This has only started occurring, possibly coincident with my installation of AquaMail 1.6.1.3. I was previously on a developer version 1.6.1.0-dev4.2. Can't think of anything else that has changed - possibly new version of Firefox on tablet, but Firefox on PC has not changed and the problem occurs if I delete email there also.
Thoughts? Thanks, Marti