iPad screen off

Apologies if duplicating a different post, tried searching and couldn’t find anything…

I’m currently running the latest gen iPad Pro 12.9 and using USB-C to HDMI cable to TV. Was playing a converted movie (1080p x265 encoding / AAC 2.0 audio / MKV extension) and was working great until trying to shut off screen. Once I turned off screen or collapsed the iPad into the case (Magic Keyboard Case) the video output would freeze however the audio would still play…

Was wondering what it takes or even possible to turn off iPad screen while playing video to TV via cable is possible with Infuse?