Yahoo bulk mail folder not syncing fully

[mi7chy]

I have Aqua Mail Pro 1.11.0-568 set up for Yahoo mail on two different devices running Android 5.1 and 4.4.2.  Spam folder is synced due to Yahoo flagging legit emails as spam.  This function has been working fine in the past but recently noticed while using my PC that Aqua Mail was missing an email on both devices.  Attempts to force sync both account top level and bulk only folder failed to retrieve the missing email.  What finally did work to make the missing email show up on Aqua Mail is to move it from Spam to Inbox on PC, sync Aqua Mail for it to appear in Inbox then moving the affected email back to Spam folder on PC and syncing Aqua Mail for it to appear in Bulk folder.

Is there anything I can check to correct this misbehavior in the future or should I consider going back to a prior version of Aqua Mail that I don't recall having this issue?

[Kostya Vasilyev]

I don't have any reason to think this is a bug in Aqua (introduced recently or not)... but:

- Please try long pressing on the account -> options and folders -> IMAP options -> turn off "optimizations".

If this helps (and the logic behind this setting has been there for years), then the fault is with Yahoo for not updating per-folder "change markers".

- Previous stable version:

https://www.aqua-mail.com/download/AquaMail-market-1.10.0-503-stable-43cc7ebbebe3.apk

And if that doesn't help either, then this most probably is again a Yahoo issue which I saw recently in someone else's debug log --

-- an inconsistency in per-message UID (Unique IDentifiers) returned by the server between the different variations on the IMAP FETCH command. Hopefully Yahoo support might understand what this "gibberish" means.

[mi7chy]

Appreciate the info.  First tried disabling IMAP optimizations but was getting the red circle notification error which I haven't seen in a long time so ended up rolling back to the previous stable version.  So far so good but will let it run for a month and hope it's back to being flawless.