Gradient stroke with spot colors separations error
Using spot colors in a gradient stroke has problems on a close path. When viewing separations, white gaps appear between some spot colors.
Herbie shared this idea
Request to Contact Support · AdminRama (Mgr, Software Quality Engineering, Adobe Illustrator) responded
Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.