How do you see the event on the track? The bandit attack already happened and all I'm finding are the regular bandits.
Have you been to the Bandits Camp at night? Found Jester? Chitchatted with Jester? Seen Tank and Scar there? Gone back and chitchatted some more with Jester? Do all that then go to the Track at night and you should see what you need to see.
