When attempting to drag the color selection tool circle to select a color it reverts back as if nothing was selected. When a selection was interrupted in another attempt by a phone call the selection circle was embedded into the canvas. When choosing the ‘back to project’ option and then reselecting the same project the selection circle was still embedded. Selection of another project was still left with an embedded circle on the canvas. Only way to remove the embedded circle was to completely shut down the app and restart the app again.
After attempting many times with the Apple Pencil I decided to use my finger to see if that made a difference. It worked. Attempting with the Apple Pencil again and nothing, then with a finger one last time and again it worked.
I have attached a photo of the color selection circle embedded on the canvas.