Got it to work!
1. Install only using the second disc containing the DLC, make sure all DLC is installed (check your installation queue)
2. Clear your Xbox 360 storage (Settings > System > Storage > Clear local Xbox 360 storage) [current workaround for backward compatibility issues according to "Known issues on Xbox Series X|S" in the Microsoft forums]
3. insert the second disc and start the game
The second step is what made the difference for me.
You my friend are a life saver for giving a reply on how you fixed that issue thanks I had the same issue.
