1. Latest ipad version of Affinity Designer.
2. Can Reproduce always.
3.Happens in any document.
The issue is:
1. Video 1. If in the top right corner you select some how stroke color and than working with pixel brush try to drag from picker tool to any color the color will not be applied. It will flash for a tiny period and then will be resetted to currently selected brush color.
2. Video 2. If in the top right corner fill color type is selected everething works good: drag from droper tool to any color on the canvas will apply that color to brush color.
3. Video 3. For the top right color wheel selector and its dropper tool that does not matter that type of color fill is choosed ( stroke or fill ) . Selecting color will always apply it to the brush color and this is good becouse pixel brush does not have separation in fill or stroke color it just have a color, that is why it should not be dependant on currently selected color type( fill or stroke ) for any color changing tool including left droper tool.
A. So make pixel brush color lselection behaviour independent from top right selected color type (fill or stroke) (for left droper tool)
B. Make visual distinction of which color type is selected in top right corner. For fill type there should be just a circle with choosed color and for stroke type there should be donut with choosed color. Overwise there is no way to see that type of color is selecte now. That leads to some unnessasry mistakes than you wanted to change fill color and accidentally chane stroke color and vice verse or than you trying to change pixel brush color with left dropper tool and nothing happens.