You know I just tried it and saving (from an action bar icon) worked. So saving upon a phone call would work too.
What could be different? Did you perhaps turn off "contact chips" in app settings -> composing and sending?
I don't know what is different.
Settings -> "Contacts" -> Contact chips is enabled. (Search in the settings is useful!
)
What else in the settings should I check?
Here is the exact scenario that leads to the bug:
(version 1.10.0-403 with 2-panel UI on a Samsung Tab4).
Tap on the pen at the top -> composition window opens
To: type "test"
("test" is converted to a red chip at this point)
Message subject: type "test"
Message body: type "test"
Tap on the floppy image (ha-ha!) -> exclamation mark appears on the right end of the "To:" line.
The ways to save the draft at this point are:
1. remove "test" from the To: field, making it empty
2. Tap on the red chip and add "@domain.com" to it
3. (I just discovered this) tap on the "go back" hard key of the tablet, at which Aquamail offers a menu "Draft editing" with three options "save and exit", "keep editing", "Discard changes". The first one does work - it saves the draft.
Note also, that if I tap on the tablet's "switch" (multiple windows) hard key, and switch to a different app, Aquamail displays "saved the draft" message, but it doesn't.