We'll need to figure out how to repeat the problem.
Meanwhile, i have done this quest a few times and have not had any problem yet, but i always do this in Real-Time. I would never kill Mad Max, especially since that's contrary to the story - you're supposed to be there to rescue him. Why would you kill Mad Max?! How could you do that?! You killed Mad Max! Anyone who would do that, deserves problems lol.
First, i dialogue with Detective Rocketansky (Max), then i fight the bikers, then i realize i have to fight Goose too, which is obviously some weird mistake since Goose is Max's best friend, but oh well. Then i go talk with Max again and quest is done. Exit and progress to next chapter of this awesome story.