What is your AVR again? I had this issue with my SC-LX901. It would give a screen of snow and I found the only way to stop it was to quickly hit the AVR 'home' button and then 'back' and then the signal would sync properly. I spoke to Sony and Pioneer about it and neither would admit it was their device. I had my money on the pioneer though as when you took it out of the loop i.e. connected directly to the PJ, it all worked flawlessly.Curious issue I'm still having is when changing inputs on my avr from cable to blu-ray player, or starting a disc when on the blu-ray player input, is the screen goes pink pixilly (can still hear sound) and I have to switch back to the cable input then back to the player and the image is clear. Replaced the player cable with a no name 8K one from Amazon, but will install some 6ft Monoprice 8K just received to see if that makes a difference.
I bought an HD Fury Vertex 2, specifically to sort it the HDMI issues out, (which it did of course). I was delighted that (super bonus) it gave me the added benefit of Dolby Vision capability!