BI has the following on the function I just turned off. The last sentence is interesting. I'm pretty sure its what has been causing the cams to stop responding. Seems they might have been too busy to respond.
"The Get events with PullPointSubscription setting is set automatically if you use the Find/Inspect tool and it discovers that your camera supports Events. The software will monitor the events stream from the camera in order to facilitate camera-based motion detection and triggering, which also must be enabled on the Motion/Trigger tab. It has been found that some cameras do not properly support this, resulting in a high network activity as the software attempts to pull the events, in which case you may wish to override this feature by disabling it."