I randomly miss out alerts of notif and calls The stuoid thing keeps ringing denoting that I am getting a call but I can't see who is calling u less I have the

I randomly miss out alerts of notif and calls The stuoid thing keeps ringing denoting that I am getting a call but I can't see who is calling u less I have their chat window open then it shows a Join button Legitimately irritating as it happens several times a day Root cause? Their notification is generated but we can't see it unless we do alt tab