Martin Mac Quadray fx

Hi,
Can anyone who has used these fixtures tell me how to get the in-built fx or what is listed as "beam fx" DMX channel on the console to work correctly.
If I select a beam fx and then try to rotate any of the four fx prisms the
beam fx defaults back to home or open.

Not sure if it's a fixture library issue or something else I need to do to get this to function correctly.

Regards C
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