I will just go straight to the point. Someone I know of Copied his TRC20 wallet address from his CEX wallet. And sent it to someone during a particular transaction.

So days after he wanted to do another transaction, With the same wallet address unknowing to him that CEX addresses have a particular fixed time interval.

After the transaction with proof, he checked his CEX account wallet and found out that he did not receive the token. So he was wondering and confused of what would have caused it. So he decided to Copy the  TRC 20 address from his CEX account on doing so he found out that the new address he copied were different from the old one he used.

 So back to my question does DEX account addresses have a time limit? Or is it permanent like our code wallet address.