I can now confirm I fixed a similar problem on a t758 with a vm130 by buying a new hdmi cable. I used to run a inwall 15ft cable from the nad output to the tv, never had a problem before, but after adding the vm130 and a new 4k tv, I started losing signal very frequently. Most often in the ps4 pro, the chromecast ultra and even the cable box sometimes, video would cut for a second before returning, sometimes it would be a flicker mess. I did test another cable with the same results, but it was just another hdmi cable I had lying around. After reading about 4k and hdmi 18gbps cables I discovered my old cables were not rated at 18gbps, so bought a 10ft monoprice certified 18gbps cable to replace the old 15ft cable. Quite a big difference, now the video signal lock is faster, and I have yet to see it lose signal again. I also rarely need to power cycle the nad for the ps4 pro signal to lock, but will not flicker once signal is acquired, so I am very satisfied now. I have been testing this for 3 weeks now, and I consider this issue solved. Maybe it was the 18gbps or maybe the cable length but it worked for me. Hope it helps someone else.