I had this problem for a while on my P20 Pro and now it's back again on an S22+. When new email comes in I get an alert, which is fine. However, when I open gmail, each time I open an unread email a moment later an alert sound is played again. Opening an already read email does not result in an alert. I don't want alert sounds played when I am already in gmail, for each message I choose to read. I don't see any settings related to this. Has anyone got an idea how to fix this odd behavior?