Sponsor/Exhibitor Co-Host Permission Issue in ZOOM EVENTS

Hi,

I am currently experiencing what seems like a permissions design or technical issue with a Zoom Event. I have a few sponsors and exhibitors and each of them is permitted access to attend all the sessions. In both webinar and meeting sessions for our multi-session event, whenever these accounts join they are AUTOMATICALLY made a co-host, which creates an administrative burden to the actual meeting host to then have to remove them from that role, PLUS lots of confusion for our sponsor/exhibitor contacts who simply want to attend educational sessions NOT co-host them. Zoom chat support has left me hanging on this and I'm wondering, is this a tech issue for our event, or simply an error in design of the Zoom events program??

Reading through permissions how-to's it seems that exhibitors should only be able to host their OWN sessions in the expo booth or ones that we have assigned them to specifically, but this is not what we are finding in practice.  

If you've had a similar issue and found a solution I would love to know! The settings are hard to navigate but as far as I've checked only a couple of sponsors have speaker roles on a COUPLE of sessions. 🙊