The cause of this is unknown. There is some interference with the custom colorbar generation, which was implemented to nicely align the top and bottom of the colorbar with the top and bottom of the map area (excluding the axis ticks and labels). Additionally, this conflicts with passing user-specified colormaps and normalization schemes.
The cause of this is unknown. There is some interference with the custom colorbar generation, which was implemented to nicely align the top and bottom of the colorbar with the top and bottom of the map area (excluding the axis ticks and labels). Additionally, this conflicts with passing user-specified colormaps and normalization schemes.
Further investigation is needed.