Adding symbols in Creo Illustrate for Thingworx 8.1

Hello,

I have added symbols and annotations to a model in Creo Illustrate 3.1. They show up in Preview Sequence but they disappear when I Publish to Thingworx 8.1 and deploy it to HoloLens. Is there a way to see symbols in HoloLens?

Thanks in advance.