user1111111 Under "Sound & vibration > Media", "Show media on lock screen" will periodically stop showing media, usually after a reboot. If you toggle the setting off and on again, it will show the media again. Is anyone else experiencing this?
VehicularClatter298 I'm experiencing this, too, same as you. First time I lock the screen while something is playing, and then turn it back on, it flashes for a brief moment and then disappears. When turning off and on once again, it simply doesn't show up.