First you should please note that you are not literally transferring assets between nodes – you are updating the blockchain which represents the addresses that own those assets, and each node has the private key(s) for controlling certain addresses.
So the question of whether you can or cannot see the balance on A2 does not literally relate to whether the assets were transferred to A2. The transfer has taken place on the blockchain, it's just that A2 doesn't know about it.
In any event the most likely explanation is that the nodes are not connected to each other and synchronizing blocks. Check the blocks field of getinfo on each node to verify if they are in sync. If not, check the clock times on both servers are close together and/or try using addnode to add one node's address to the other.