My company uses Google Hangouts chat as an IM client.
When there is a new incoming message in a Google Hangout multi-person chat that I have joined, neither the Windows taskbar icon for the Hangout chat window nor the Hangouts icon in the Windows notification area / "system tray" flash or otherwise indicate that there has been a new message.
The browser (Firefox) window in which I have Gmail running also shows incoming chat messages, but also does not flash upon receipt of a new message.
Consequently, I am frequently missing new messages, and unintentionally causing my colleagues to think that I am ignoring them!
I'm running Windows 8.1.
I do have the Down-arrow-options-menu > "Sounds for incoming messages" checkbox checked (from the Hangouts window with my list of contacts):
As well as the Gear-icon > Notifications checkbox (from a Hangouts chat conversation window):
My OS volume is not muted for any application for my active speakers (my headset -- the only enabled sound output device on the system), and I can hear sounds from other applications normally:
I'm not sure at this point why no notification occurs on incoming messages. Is the OS preventing it? Is there some Hangouts setting that I have inadvertently disabled? Does Hangouts simply not have this functionality?
What can I do to get the Hangouts taskbar icon to flash, a sound to play, and/or otherwise notify me when there has been a new message in chat, such that I no longer miss incoming messages?