My old messages have disappeared
Every account has a limit of 15 million messages. If you chat a lot, you may have reached your limit, causing your old messages to disappear.
To check how many messages you have, go to any chat on the desktop version and write something. Click the time your message was sent, then look up in the browserĺs address bar. The number opposite msgid is the total of all your incoming and outgoing messages. Whenever the limit is exceeded, old messages that take up space are deleted.
The only way to avoid this situation is by being more conscious about the way you use messages. Leave overloaded chats which are not important, unfollow bots and newsletters you donĺt need, and so on.
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