Constant Aural Alarm when passing MCP Altitude

[Talanos]

I don't actually think this is a bug, more so I may be missing a flow item. However, I'm on final, AP is off, AT is on and I pass the selected altitude in the MCP, however, upon doing so, I get a constant, distracting aural alarm that doesn't cut off until touch down. How do I cancel this?

[AaronL]

Press the master warning  to silence the alarm. It doesn’t illuminate, just press it. 

[Eddie]

If you are using a binding to turn the AP off, please make sure that binding is the one called "AUTOPILOT OFF" and not toggle. To silence the warning, press the red button on the sidestick.