Map cycle problem - Reward if you fix it -

I am running Garry’s Bots on one of my servers, it runs fine and everything, until the end of each round. After the round, it is supposed to go to the next map in the map cycle, it does, but it doesn’t stay on Garry’s Bots, it switches to sandbox. Some people say it is the gamemode, but I talked to the creators of Garry’s Bots, and they don’t think that is the problem.

If you can help me fix it, and get it working, I will send you $1 Paypal. Not much, but better then nothing.