Device turning off when plugged into HDMI port

This evening one of the HDMI ports on my Samsung TV started behaving strange. When I connect any device (AppleTV, Fire tv, or even an HDMI switcher) it automatically seems to “turn off” the device. When I unplug from the HDMI port it immediately turns on. It’s not the HDMI CEC sin since I’ve confirmed this as well.

I’ve tried a factory reset on the TV and this didn’t help. Any idea how to further troubleshoot?