I both own four Sena 30K, and we use them frequently. Unfortunately, a few days ago, we were not able for two Sena to do 'Open Mesh' or 'Group Mesh' after upgrade firmware 3.1.1.
I did a hard reset to his device, and it didn't work.
Now when I turn on the "Open Mesh" the device won't announce the channel. It would just say "Open Mesh On". The Group Mesh didn't work too.