I have seen similar threads, but cannot find now.
So, I'm running libreELEC 9.2 with Hyperion.ng. I changed to 3 input capture card, but every time the HDMI signal drops (even same source changing apps) the USB capture has to be reset in Hyperion UI.
The USB capture is much better for colour matching than last one( pclin will post you specs) , but this is a major issue, having to reset every time.
Thanks for any assistance.