XF 2.2 Thread Alerts - Explanation Needed

Brad L

Well-known member
One of the most frequent questions I get about XenForo is why members sometimes don't get an alert when new content is posted to a thread they're watching. I would love to see a list of reasons why that might occur. I understand that a member will only get one notification per thread until they visit that thread again. What I don't fully understand are the other potential reasons.