Login into Servicenow Click on phone icon Openframe window opens in the left top corner. The header of the openframe appears to be invisible and hence cannot be moved or closed. Need to refresh the screen for it to disapear.
Confirmed in Madrid and New York
This is related to system property glide.ui.js_includes which when set to false will cause this behavior.
Out of the box this value is set to true.
To fix this issue go to: https://<your_instance>.service-now.com/nav_to.do?uri=sys_properties.do?sys_id=54455698c0a80169006b3fc7d90188f4
Go to value and change to true