Thanks @Asoong!
As a general update, I wanted to chime back in and let the thread know that I have forwarded along each of the items listed in the OP.
Here’s where we’re at currently:
Edit: 10/1
Party chat - Resolved, though we’re keeping our eyes out for additional reports.
Clan chat - Resolved, though we’re keeping our eyes out for additional reports.
Groups - Still under investigation.
Friends list - Still under investigation.
Community chat - Resolved.
Profiles: Fix in progress.
Unable to change character (when in a party): So far we are unable to repro this issue, but we continuing to keep our eyes out for feedback and callouts regarding this.
invisible characters (some chars not displaying in party menu): At this time, believed to be related to the ‘Groups’ issue noted above.
Broadcast (not working) - We believe we’ve identified two separate issues with this; friends list displaying the wrong time since the last broadcast was sent, and the second issue being broadcasts not being sent at all. Both are actively being looked into.