The main stream (1920x1080)of my Ubiquiti G3 Bullet won't connect if I enable hardware acceleration but the 640x480 sub stream will. I also have two trendnet cameras that work fine with or without hardware acceleration.
Sighthound V6 has degraded for me over the past few months, identifying random objects and shadows etc as people which spams my setup with useless recordings. I setup Blue Iris with Ai Tool which uses DeepStack Ai Server to verify objects before recording. It took a lot of tweaking but it's working ...