Teams Live Events: Adding shared screen content to queue not possible?

layer9de  This is a huge flaw!  We were trying to do a dry run today for an upcoming webcast and realized that it's not working as it did during our last webcast.  The role of the producer, the way it's set up now, is that he/she does it all.  Previously, you could have presenters share their content and it would not take over the active Live event...you could queue it up and then send it live when ready.  Today, anytime a presenter hit the share button, it instantly put them in the live screen.  This happened even before we actually hit the start button to go live, as well as during the live testing phase.  

Additionally, my team needs to be able to poll the audience in the Live Event.  This still seems to not be an option without using a 3rd party.