well, i swapped my splitter, made the h3 no longer seeing 4k, 4 screen wasn't 4k for testing. Once it still crashed. Another time after exiting, i lost any pip, small, swap, nothing. unplugged the h3, then swapped my 4k splitter back in (it reads the capability from my main 4k tv, then is able to also output the second leg as 1080p for my office and bathroom) its been working with 4k 4 screen, i did get a resync touching the arrow once, when the red boarder becomes bigger and brighter.
its great when it works, watching a dvr show say in the bottom right, 3 screens to monitor and easily swap audio to.
seems its glitchy, its easy to see when it reboots, i have a gig switch in that location, and the h3 light drops off right away.