Zoom Scheduler iPad not syncing with Google Calendar

We have multiple Scheduling Display Only rooms across three offices. Those rooms use an iPad as a Scheduling Only Display. Google Calendar is our calendar service. What we have discovered is that they are not automatically syncing with the iPads, in that we have to manually refresh on the iPad (by swiping down on the iPad) to have new meetings show up or to reflect when a meeting has been cancelled.

When we do refresh manually the calendar on the iPad is the same as Google Calendar. So there's no issue with getting the correct data, it just never pulls the data to begin with. We've waiting over five minutes for newly creating or deleted events to show up and it never does.

I'm an IT contractor so I tested with the same iPad signing into another client's Zoom instance as a Scheduling Only Display and events sync immediately so I know it's not a network or hardware issue. Both use Google Calendar, with pretty much the exact same settings. 

Is there a reason why the Zoom Scheduler is not refreshing automatically? What kind of setting could be causing the delay?