/alwaysrandom 0 does not work in survival in castle

1. In the normal mode, type `/alwaysrandom 1` to enable always random class
2. Switch to the survival mode
3. Run the survival
4. Type `/alwaysrandom 0`
5. End the round by winning or dying
6. Start survival again

Expected: i can now choose a class
Observed: alwaysrandom still active, i get a random class