[Evolution] mails retrieved through davmail disappear

[Xavier Bestel <n0made free fr>]

Hi,

I'm using Evolution 3.16 to access work email through davmail (because
I have to), with IMAP/CaldDAV/LDAP. My problem is that on mail receive,
I see a notification with the Subject line of the new mail, when I
enter the corresponding INBOX I see briefly that the mail arrived but
it disappears after like half a second.
And then the only mean to really see it is to quit Evo and restart it.

Does that ring any bell ?

Thanks,
        Xav