YouTube airplay from iPad stops and restarts on Apple TV 3

Hello,

I believe my iPad started having this problem when it updated. Both devices are fully updated now.

While air playing YouTube through iPad Air 3 on atv 3 when I lock my iPad or it goes to sleep the video shows loading circle on tv, stopping the video and showing video time bar That only shows from 0s to 1s and play button only. When I resume playing from iPad lock screen or turning on iPad or even pressing play from Apple TV remote, the video starts from 0s. It’s really frustrating since it is my fathers iPad and tv and I can’t help him solve it.

i have tried the following things

updating both softwares

changing wallpaper to stills instead of live

resetting Apple tv

redownloading YouTube app

clearing caches cookies etc

stopping Apple TV from going to sleerestarting both devices routers and modems

i would like to avoid changing iPad settings to never sleep as it will drain the battery way too often and kill its life

thanks for your time guys