This issue exists from several previous releases. When I'm playing a video and I go back but I don't exit the app and reopen the video from history or where it's stored on the device, it sometimes doesn't play any audio (video plays fine). I try increasing the volume but nothing. After closing the app from recents and reopening, audio works again.
I have faced this issue on two devices -
Samsung Tab S9 Android 14 One UI 6.1.1
Nothing Phone 2a Android 15 Nothing OS 3.
Both running 3.6.2 right now.