Hi, I have the Huawei Honor 10 and since the update to Emui 9 and Android 9, my phone regularly makes strange noises. As if a notification would come but there's nothing. It gets on your nerves gradually
Have you already tried a complete reboot? So reset mobile phone?
My mobile phone has always problems after updates and it always helps 😊
Did you have your phone checked for ADHD or autism?