It happens to me too but it's because I am getting other notification on the phone like my ring cameras going off. Notifications that show up on the phone but not AA. My S21 just got updated with Android 12 and now I can't play music through YT Music that is stored on my phone through AA. It tells me there are no files but when I go to YT Music on my phone it all works. So, you fix something and break something else.