Multiple Tabs

I need your input concerning opening multiple tabs. Some of my team members open more than one tab in the same browser to access Zephyr.  This allows them to switch quickly between different test cases for different devices by clicking on the tab.  

Since the user has more than one tab open in Zephyr and updating different test cases will this be a problem?  

The tabs should have different session ID and it should not be an issue, correct?.  

I'm asking because Zephyr is giving theses members of my team errors during the day.