genki shadowcast 2 pro

Three days ago, I got my Genki ShadowCast 2 Pro device delivered to my home and have tested it with OBS to see how it works with 1080p60 and 4K60, and only the 1080p60 preview options is perfectly in sync with the display on my Sceptre 55 inch 4K TV, but when I try it with 4K60 with the preview...