some users of my community are reporting that they receive mail notifications for topics which they have nothing to do with. After some investigation I found that certain users keep getting mails when a certain group is @mentioned. When checking the mail logs in the admin interface I found that the reason for this mail is stated as
user_linked while they are clearly not linked in the posts at all.
Can somebody confirm this behavior? Is this a discourse bug or related to some kind of misconfiguration? This started happening some versions ago but its unclear when exactly (but somewhen within the last 5 weeks).
My current discourse version is 2.5.0 (6a42acbfb7), but the behavior has existed also before upgrading to 2.5.0.