Hello @Dwight
It gets ignored because that’s how appearances work: they override how the annotation is displayed.
From https://www.pdftron.com/documentation/web/guides/annotation/custom-appearances/ : “WebViewer supports adding a PDF object or page as an appearance to any annotation type. This allows an annotation to be displayed in a custom way which overrides the default rendering based on the annotation properties. This custom appearance is also compatible with the PDF specification so after downloading the file the annotation will appear identically in other PDF viewers.”