Twitch has alerted users that a “glitch” in an message archiving function has resulted in a random mismatch of messages ending up in the wrong users message archives.
Twitch alerted users by email:
“On May 5, 2018, Twitch removed a legacy feature called Messages and provided users the ability to download an archive of past messages,”
“Due to a bug in the code that generated the message archive files, which we have since fixed, a small percentage of messages were included in the wrong archives,”
“As a result, some users who downloaded their message bundle may have one or more of your messages in their archive.”Twitch