PCC6K ProRes/16:9 deactivated when connected to Atem Extreme

When the Pocket Cinema Camera 6K G2 is plugged through HDMI to the Atem Extreme Mini ISO the codec menu changes and doesn't allow to select any 16:9 ratio so the result is any other aspect ratio with two black stripes at the PROGRAM.
The only way to get FULL HD in the atem is connecting a monitor with in and out HDMI or with two converters HDMI to SDI and SDI to HDMI again, but I lose the tally and control functions. (Yes, I can use a second SDI cable to get remote control again, but it changes again to and undesired aspect ratio).
The only way to get FULL HD in the atem is connecting a monitor with in and out HDMI or with two converters HDMI to SDI and SDI to HDMI again, but I lose the tally and control functions. (Yes, I can use a second SDI cable to get remote control again, but it changes again to and undesired aspect ratio).