Custom fields are not looking as fields type there are from

Hello,

I notice that, if i use a reference field as source of a custom one (ie : i create idSeverityMitigated from idSeverity in custom screen, named idSeverityMitigated__IdSeverity), it work fine but colors associated to reference values are not copied with new fields.
It will be good to keep the look and fell of reference fields in derivated ones.

To be more clear, there is the final render of risk mitigation in my case :
 

Note that's it will be more clear if colors are kept.

Regards,

Better and better.

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