Just to reiterate for the less observant, here is the fix for the "bots unload at mapchange" problem.

1. Start up the server with bots.
2. Once bots have joined the game, go to the console and type meta refresh.
3. Verify that bots are still active in the server, then shut down the server.
4. Restart the server, everything should be fine now.
5. Repeat this any time you change versions of RealBot.