I noticed recently that my Duplicati result emails have a “Log data:” field at the end, where they used to have separate “Error:”, “Warning”, "and “Message” fields. Did this change recently? I’m using 2.0.4.5_beta_2018-11-28.
I use dupReport to check backup status so I rarely look at the actual emails coming from the backup. For all I know this may have been changed a while back and I just never noticed. 