Keep hearing a double beep

When using my phone to play every few minutes I hear a double beep (more like a ding ding sound). It seems to only happen when playing. No phone notification icons come up at top of screen. I'm not sure if it has anything to do with RHP, but only seems to happen when playing. Is this being caused by RHP and if it is how do i shut it off?

@Russ
Thank you. It was annoying

The double bell will only be heard if more than one browser window is open - this includes game analysis. This will be fixed shortly - but it has been this way since before the update.

The real problem though was the phantom alarm bell when no new game activity has taken place. This has now been fixed.