I have a DS-7608NI-I2 / 8P NVR on most recent firmware and 8xIP cameras of different types and ages. All IP cameras (example front door DS-2CD2155FWD-I) have face detection enabled in smart event and "Enable Dual-VCA" checked. All streams are H.265 (but NOT H.265+). Initially when I navigated to VCA Face Capture on the NVR I saw 3 of my 8 cameras were allowing this to occur. Once I finished "fiddling" with the settings of the other cameras in an attempt to make them appear as well I found that now none of my cameras allow VCA face detection!! All I get is the error message "The camera does not support this function" when, half an hour ago, three of them did! Any ideas??