How long after which the Mashup widgets becomes unresponsive?

I'm using a GetProperties service to get the updates on my Thing Property back to my Mashup, a Radio Button widget in this specific case. The 'Automatically update values' flag is checked', and the Thing Property has a 'DataChangeEvent' set as 'Value'.

When I load my Mashup, and update the property value in the Composer UI, the change is reflected back in Mashup. However, after some amount of time, any updates to property is not reflected back to the Mashup, and I've to reload the web page to get back the responsiveness. So, is there a time defined inside the Thingworx server, after which the loaded Mashups stop listening to the property changes?