The landing capability freezes at Alert height.
Below alert height you only need to go-around for the red autoland warning light.
Relevant Master warning and caution aurals are NOT inhibited below alert height (those not already inhibited).
The only time you will get the crickets/triple clic below alert height will be loss of both autopilots which will also bring on the red autoland warning light.
The system was designed that below 100'you only go-around for the autoland red warning light/ No thinking / decision making below alert height.
Failures below 100' tend to present on ECAM at about the start of the flare.