AHA! FIXED IT. Download the latest Game HD program and install it, then launch it with your Camlink plugged in. Looks like it updates the firmware or something but now it's doing 1080 again! Download it here: https://www.elgato.com/en/gaming/download...
I have the same issue with my T6s. However, it WAS working perfectly outputting 1080i through my camlink, then all of a sudden stopped working. Not sure what happened. It was right after I tried using the Canon beta webcam utility for PC but I don't ...