My facebook/messenger active status is missing even though I haven't turned the active status off. Whenever I became idle or offline, my status is missing and it doesn't the active xx ago. Any solution or explanation for this problem?
Facebook Messenger Active Status Missing
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Related Solutions
Facebook – Force an idle chat status in Facebook while still working in it and without going offline
In short it is not efficient/possible for the Facebook team to deal with it.
The way I see it, idle is used to show that the user's attention is not in browsing Facebook. To elaborate, a user can be playing an intensive game (Bejeweled/Farmville) and end up in idle, but as soon as focus moves away from the game, online status resumes.
The best way is to go offline but for specific people using friend lists.
And here is an engineer from 2008 explaining why this is difficult
The most resource-intensive operation performed in a chat system is not sending messages. It is rather keeping each online user aware of the online-idle-offline states of their friends, so that conversations can begin.
The naive implementation of sending a notification to all friends whenever a user comes online or goes offline has a worst case cost of O(average friendlist size * peak users * churn rate) messages/second, where churn rate is the frequency with which users come online and go offline, in events/second. This is wildly inefficient to the point of being untenable, given that the average number of friends per user is measured in the hundreds, and the number of concurrent users during peak site usage is on the order of several millions.
Surfacing connected users' idleness greatly enhances the chat user experience but further compounds the problem of keeping presence information up-to-date. Each Facebook Chat user now needs to be notified whenever one of his/her friends (a) takes an action such as sending a chat message or loads a Facebook page (if tracking idleness via a last-active timestamp) or (b) transitions between idleness states (if representing idleness as a state machine with states like "idle-for-1-minute", "idle-for-2-minutes", "idle-for-5-minutes", "idle-for-10-minutes", etc.). Note that approach (a) changes the sending a chat message / loading a Facebook page from a one-to-one communication into a multicast to all online friends, while approach (b) ensures that users who are neither chatting nor browsing Facebook are nonetheless generating server load.
[Source - Facebook Engineering Notes - Facebook Chat ]
This is because Facebook has some mobile deviceId against your name as you logged in from mobile once. Though you have logged out from that mobile device, the data has not cleared yet.
In security settings, you can check active session and here you can end the session causing this problem.
Best Answer
Are you using the FB Messenger app or through a browser? In either case this would have nothing to do with user settings that you set. This sounds like an actual bug in Messenger, especially if you're using the app version for Android or iOS. If you're using an app try uninstalling the last update (i.e., reverting to the previous version of the app) or even uninstalling and reinstalling the app if reverting doesn't do the trick.
If you're experiencing the problem in just the browser, I would suggest closing the browser entirely and logging on in a different browser, you can use the same browser so long as you've cleared ALL cookies and anything related to Facebook. Keep in mind though, that this could be a browser related issue so it's best to try it on a different browser(assuming you're using Explorer or Edge, try using Chrome or Firefox instead).
If none of these work you have my deepest condolences, but I hear MySpace is making a comeback, so chin up. 😜 Totally kidding.