Odd Device Watchdog results

I'm getting peculiar results on one of my devices. There is a fairly consistent pattern where Device Watchdog reports an approximately 10 minute delay for the device and then reports a less than one second delay for the same device less than one minute later. I don't understand how that is happening. It seems like the second test is somehow buried within the first test. Any ideas of what is happening here? The device is one of the relays in a Zooz ZEN16.

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