DRS 17 Bug: Font Not Rendering in Delivery

We have a title with a single occurrence of a line of Hebrew that works fine until rendering for delivery. The render does not use the specified font (Adobe Hebrew, a serif font), but inexplicably switches to a sans serif font (which font is unknown).
If the Deliver page is parked on the clip in question or the timeline is played there, the font is displayed correctly. It is only when the render is underway that the font is wrong.
If the Deliver page is parked on the clip in question or the timeline is played there, the font is displayed correctly. It is only when the render is underway that the font is wrong.