If you enter Playmode and Lock the Graph Inspector while viewing a Macro attached to a live object.. and then exit playmode. You can then NOT edit any graphs at all until you go back into Play mode and turn the lock off and exit Playmode again.
The lock icon doesn't show up to Unlock the graph unless you're already on a graph that it's locked to for editing.
Using Unity 2018.b10 and Bolt 1.3 beta
Customer support service by UserEcho