I think I know what you're talking about, I have a 2022 The Frame, similar to
this one but being the 32 inch model it's comparably basic, 1080p 60 Hz only and the One Connect box is a simpler model with only 2 HDMI inputs and apparently a lot less processing speed (in other words, it lags balls).
I've had an issue with it that it often doesn't work correctly with RGB/Full range input. Colors look completely off with heavy RGB crush, if you try a calibration chart it'll be unable to reproduce almost half of the gradient, the three workarounds I found were to keep toggling between resolutions until it somehow looks normal, to enable HDR (doesn't fix but helps somewhat) or to use 4:4:4 limited color. I wonder if it's a bug, but it definitely affects modern Nvidia GPUs. Now that you mention it, it doesn't seem to look as bad on my old Mac mini (320M on 309.08 driver) with the same settings, haven't really tried it with my laptop's AMD graphics, I should do that sometime. Unlike the HDMI port, the USB-C port is controlled by the 5600H's graphics instead of the RTX 3050 for some reason, which gives me that option.