Accessibility - Narrator reading canvas alternate text

I am using windows narrator in scan mode. Using arrow keys when I move the focus to GoJS diagram, the narrator first recognizes the element as image and then reads the following:
This text is displayed if your browser does not support the Canvas HTML element.

This could cause confusion to people using screen reader.
I think we should use aria-hidden to hide this from screen readers reading it.

Should I open a support ticket for this?

Does adding aria-hidden to the Diagram DIV not fix this?

Yes, works. Thank you