Thank you for contacting Intel Communities.
Just to confirm, you want to allow guest users to present using the Intel® Unite app enterprise.
To do this, you need the Plugin for Protected Guest Access for the Intel Unite® app.
For more information on deployment and plugins, you can review the Enterprise Deployment Guide for the Intel Unite® app.
Let me know how it goes or if you need further assistance.
This is an expected behavior, since the guest devices are being connected to the network created by the Intel® Unite Hub, the devices cannot connect to two different networks at the same time, they abandon the guest network with Internet access to be able to connect to the Intel® Unite Hub.
On the other hand, if the guest devices are connected to the enterprise network (not guest network) where the Intel® Unite app was deployed, you should have Internet access.