Mac Client chat notification. Bug?

Hi,

This might or might not be a bug, but when someone messages me, while i'm say watching youtube videos on google chrome, my league client that's still open in the background wont jump up 'n' down, you know what i'm saying? Like it doesn't notify you that someone messaged you in any forms, be it actually popping the league client onto your sight of view, or the jumping up 'n' down thing I mentioned earlier to show that something happened in the client. Again, I don't know if this is a bug or not, but it sucks to go back on to the league client to find that someone messaged you 2 hours ago, while you essentially didn't have any knowledge of it happening during the 2 hour gap.

Thanks for your time!