Bug report V4.2.0 Desktop crashing 'color indicater' column visible in output.

When running 640 RGBAUV led cels in a random effect the desktop crashes when the 'color indicator' column in an output window is visible.

Hiding this column results in a not crashing but lagging desktop interface (actual output is as expected and on time)

Closing the output window results in an almost smooth running desktop interface.

Having the 'color indicator' column visible also heats up the desk critically.