I have a mac, and no such issue with my 3020.
The web page "has to much data" sounds like nonsense, how can it possibly be pushing more pixels to the projector than a fast moving HD movie scene!!!
What problem I did have (in case a clue):
Had a rocketfish HDMI switcher, and there was a blank screen with my Cisco PVR unless I connected/disconnected cables, mac sometimes flickered, and inputs would sometimes not show unless I switched to another input and back.
Got rid of that POS switcher, and got some cheap no name Chinese HDMI switcher from the corner surplus electronic store (knowing I could easily return it if it did not help), and now everything works perfectly!
Make sure to try with a <15ft straight HDMI-HDMI cable with nothing in between to narrow it down.