Not seeing calendar items entered by others unti I refresh

Not seeing calendar items entered by others unti I refresh

My coworkers have "Delegate/Manage" access to my calendar. They need to schedule me for meetings. They don't see items I enter and I don't see items they enter until I manually refresh my browser page.

I remember setting an auto-refresh option somewhere but can't seem to find it now.
Can someone verify if this should work without manually refreshing? And if so, what should I be looking at to correct?

Any help is appreciated,
Thanks
Eddie