# Chat messages went from being "read" to "unread" suddenly

**URL:** <https://meta.discourse.org/t/chat-messages-went-from-being-read-to-unread-suddenly/271920>\
**Category:** Bug\
**Tags:** chat\
**Created:** [July 18, 2023, 1:17am UTC](https://meta.discourse.org/t/chat-messages-went-from-being-read-to-unread-suddenly/271920 "2023-07-18T01:17:01Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![hello-smile6](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/hello-smile6/32/304628_2.png) [@hello-smile6](https://meta.discourse.org/u/hello-smile6)\
**Post date:** [July 24, 2023, 12:06am UTC](https://meta.discourse.org/t/chat-messages-went-from-being-read-to-unread-suddenly/271920/9 "2023-07-24T00:06:43Z")

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I think it’s a combination of stale data being cached by a service worker and per-IP ratelimits on forums hosted by CDCK. (Basically, I think stale responses are used for checking unread chat message counts when the server responds with 429)

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_[View the full topic](https://meta.discourse.org/t/chat-messages-went-from-being-read-to-unread-suddenly/271920)._