Some users had better results manually setting the PS4 Pro to broadcast in 'YUV420' while others had better results leaving it in 'Auto'. Use YUV420 - If the cable is not the issue, you can check what type of signal is being sent from the PS4.

Since the IBIS is a 'passive' switch (it does not use a power adapter) you might get signal loss if the cable does not have enough bandwidth when trying to push that much information over long distances. (For our video we used 3ft long Premium HDMI cables on each end). This was easily fixed by using Premium HDMI 2.0 cables, or shorter HDMI 2.0 cables. Use HDMI 2.0 cables - Most of the time the problem was they were either budget HDMI cables that did not meet the full HDMI 2.0 specs/bandwidth requirements to run 4K HDR, or the cable runs were too long.Here's a few tips I've gathered from all the YouTube comments and what has worked for other users. The errors varied from signal flickering to no signal at all. We've had some users experience mixed results with this setup.

Turn on hdr ps4