Config Announce Address automatically Overwritten to /p2p/peer-id

#### Version information:

ipfs version 0.7.0

#### Description:

I've successfully gotten a couple of nodes to communicate in a private swarm through a relay by enabling both AutoRelay & RelayHop on one of the nodes with a publicly accessible connection, as well as also hard-coding the relay addresses for the other nodes in their announce config. This all works perfectly for ~15 minutes, until for some reason the announce addresses are overwritten on the nodes behind the NAT to `/p2p/PEER-ID`. After that point the nodes drop out of the swarm and become inaccessible by each other. Is there anyway to prevent the nodes from overwriting the manual announce address in the config?