[Teledhil]

I have no issues with the Elgato Cam Link 4K on my setup: M1 Pro <-> Dell WD19TB <-> Cam Link <-> Sony camera.

The dock is also connected to a 1440p@240 monitor and a 1080p@60 monitor, so the capture card is not the only device taking bandwith from the USB bus.

EDIT: Now that I remember, sometimes the cam link gets very hot and freezes, not only with my M1 but also with a Dell laptop running linux. Maybe your problem is related to running the capture card at high temperatures.