S9 Beeps and Screen Dims for a Second

[Android Central Question]

I have had my Galaxy S9 for about a month. Recently it started doing something very strange and annoying. Periodically for no good reason the phone gives two small beeps the light dims for a second and there is a half circle that rises above the home button and then fades out. The beep is driving me crazy. I have cleared the cache, and started it in safe mode no relief from the problem. Any thoughts?