Always on, AG Listener is not resolving to another IP when failed over from one subnet to another one

Hi All,

I've setup AG with 2 nodes in total, 1 node on each subnet.
I've mapped AG name with 2 IPs for each subnet.

After the fail-over, the AG name is not resolving to other subnet.
This is making the AG down when accessed through AG name.
But it was function when I tried with the IP.

Any help is fixing the issue will be really thankful.