As per the Google results, we are unaware of the issue. It is most likely caused by google indexing getting out of date with the latest 50 messages in the room.
@old-square-eyes @viktomas I wonder if this related to the archives being relative to your own local date/time
@old-square-eyes Mind creating an issue for this? https://gitlab.com/gitlab-org/gitter/webapp/issues
Gitter 20.3.4 deployed to production, https://gitlab.com/gitlab-org/gitter/webapp/blob/develop/CHANGELOG.md#2034-2019-9-25
Tested all sign in options but if you see any problems signing in, please create an issue with the details, https://gitlab.com/gitlab-org/gitter/webapp/issues
@puremourning Better to discuss all of this in https://gitter.im/gitterHQ/contributing