ipad hdmi issues iOS 14.4
After updating iPad Air 4th gen, iPad 5th gen and iPhone X to iOS 14.4, I am unable to use HDMI to view video or hear audio on external monitors and TVs. External monitor has external speaker and worked prior to update. I am able to see video by get no audio. Connect to TV via HDMI cable and get audio but no video. Tried different HDMI cables. Did hard restart on Apple devices, monitors, speakers, etc. as appropriate. Validated audio setting is not muted. Same cable used with iPad to connect to monitor provides expected audio and video on external monitor/speaker when connected to laptop. I have not been able to identify solution after online search. Any insight to a solution is appreciated.