Discourse may bypass user preference when adding users to chat groups

Discourse is an open-source discussion platform. Prior to versions 3.3.4 on the stable branch and 3.4.0.beta5 on the beta branch, in specific circumstances, users could be added to group direct messages despite disabling direct messaging in their preferences. Versions 3.3.4 and 3.4.0.beta5 contain a patch for the issue. A workaround is available. If a user disables chat in their preferences then they cannot be added to new group chats.