Disappearing messages in group chats do not work reliably.

[darrenmartyn]

Disappearing messages in group chats do not function as intended, with messages remaining in the group chat far longer than their expiry date.

This was observed with a group chat with a global message timer set to 1 week, it was observed that messages sent over a month ago were still visible to all users. This was not expected behavior. . Steps to reproduce the behavior:

1. Create a group chat.
2. Set message timer to one week.
3. Extensively use group chat over a period of time.
4. After a month, scroll up and realize messages weren't disappearing.

Expected behavior Messages disappear after 1 week.

[darrenmartyn]

Update: this also impacts iOS and Desktop clients, after polling other users in the chat. I'll refrain from opening issues on those repos for now. Basically the 1 week timer seems to be disregarded by everything.

We tested with the 10 second timer in the same chat, and messages were being correctly purged. May be unique to the 1 week timer? Who knows.

Also fairly sure this one should be tagged as a security issue?

[makingthematrix]

@darrenmartyn : Thanks for the report. I'll look into that.