Pencil 2 Brush disappeared
I drew a stroke with the Pencil 2 Brush. After duplicating the artboard, I noticed my strokes had disappeared. The path was still there, though - as was the applied Brush 2. However, even in the brushes panel, Pencil 2 seemed to have no attributes. It was just blank, not even showing a sample/preview stroke. I changed the path to Pencil 1, and all was fine. Though, several days later Pencil 2 brush is still missing.
Chris Tipton shared this idea
Eric Torgeman commented
Have the same experiance Ai on iPad sucks …should be clearly stated before their primary users (like me) commit to an iPad.