how to record only one color of a fixture

I am blank on this. I have some Chauvet Vesuvios and Geysers. I want to put ONLY red on a fader (or any other single color) and nothing else at all. Well I selected the matching fixtures and picked 0 for all colors except red which I picked 100. I then did a record only to a sub. The sub is set to I-master. When I bring up the sub the colors all fade from 100 to 0 and Red goes from 0 to 100. If I hit the bump it will flash red.

I just want Red to fade on and the other colors to remain at 0 the whole time.

Split similar question:

I have the subs set to Man for these fixtures and when I hit the bump they do flash on however when I have a par or leko recorded on a sub and the same settings the bump will not flash it on.

So not sure why the multi-channel fixture works but a single channel dimmer channel does not.

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