These messages are logged if the initial connection to the dex server fails:

[ERR] CORE[wss://dex.decred.org:7232/ws]: Initial connection failed, starting reconnect loop: dial tcp 45.77.164.152:7232: i/o timeout
[ERR] CORE: Trouble establishing connection to dex.decred.org:7232 (will retry). Error: connect failure: dial tcp 45.77.164.152:7232: i/o timeout

No retrying actually takes place however. I took a brief look at the code and it seems to be because the context passed into wsConn.keepAlive is canceled. The retry loop is started properly if the following line is removed (first added in #1474):