
CandyFace
I can confirm this issue.
You don't have to draw on the main canvas though, you just have to hover over the tile on the main canvas, then the brush will appear in the frame edit window again. You will have to do this every time you step forward or backward.
It should also be noted that this affects the brush, eraser and color replacer tool, adding an ellipse or rectangle works as expected, so does filling.
