Quick update: We have deployed the chat fix to all of our servers, the disconnecting issues which were happening yesterday should now be resolved. If you are still seeing these issues, please let us know. It is important that if you are seeing this issue that you specify what you are seeing and what server you are on.
Thank you all for your patience while we worked to address the issue.
While the chat issues seem to be resolved in the Lfg channel on T3-M4, there are two undocumented changes related to the chat with 2.7.1. I was first assuming that they were related to the chat issues but they still occur. Please check whether or not these changes are intended or not, and fix them if they are not intended: