HDMI Sync Turns on/off While iPad 3rd/4th Gen is Sleeping

I am using some 3rd party hardware to monitor the sync output of an iPad's HDMI output using the 30-pin to HDMI adapter so when the iPad is asleep a TV shows one thing and when the iPad wakes up the TV will automatically switch to the iPad.
The first issue I had was that while the iPad is plugged in, the HDMI output never turns off. While it would be EXTREMELY nice if the HDMI output did turn off while the iPad is plugged in, I was able to work around this with a mechanical 110VAC timer that charges the iPad at night and removes power during the day.
The problem I am now having is, while the iPad is asleep and not powered, the HDMI sync randomly turns on for a few seconds and then turns back off. This provides some undesirable results because the TV will momentarily switch to a black screen and then back to the digital signage that it's supposed to show.
I've tried turning off all updates and push notifications and it still is happening. I've also tried my iPad 4th gen thinking that the Lightning connector might make a difference and it still does the same thing. Any ideas would be greatly appreciated.
Thank you!

UPDATE: It seems that turning the WiFi off fixes the problem. Is there any chance an iOS update might include a feature to turn off the HDMI output when the iPad's screen turns off?

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