Discovered a small bug:
create a new document of the type "Print (Press-Ready)"
select the Vector Brush tool and paint something ()
select the move tool (the painted object gets selected automatically)
from "Brushes" select any different style
from "Styles" select any style
press ctrl + z
Expected: you see the previously selected Brush line style
Is: the object gets invisible
In history you see all 3 steps.
Even if you switch between the steps the object stays invisible for the step "Set linestyle".
Update: this doesn't happen with the document type "Print"