User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0

Steps to reproduce:

Move a mail into a mail folder (exchange mail)

Actual results:

The mail did move but was not shown, there is an error in the message bar: "Cannot convert JavaScript object into an array arg 1 [nsIMsgFolderNotificationService.notifyMsgsMoveCopyCompleted]"

The data structure is clearly fine: after clicking on a folder to view the contents and going back to the inbox the mail has been moved successfully.

Expected results:

mail should disappear from inbox after moving it to a folder

Bug in the Owl add-on.