I have a sena 50S v1.0.3.  If I extend my mesh antenna and hit the mesh button once, I get the following message:

"open mesh. channel 9 mesh intercom disabled bluetooth intercom connected"

If I go on my utility app to home then click the mesh button, I see that I am using channel 9.  That said, the rest of the user interface is confusing.  There is a current mode and it is set to a greyed out "open mesh" setting.  I can't seem to turn it on or go into private mode.

I click "mesh grouping"  this opens a status panel that says Mesh Grouping...  and does nothing.  If I wait about 30 seconds it says grouping failed.