ALERT: system link anniversary to reach

Just letting know 343 know that when in a system link, if u have the map packs on reach you can’t join a game in the anniversary disc. Will do the same thing if anniversary try’s to join reach will not work, says the maps need to be downloaded. But shows the map that they are playing on like battle creek, or hang em high, and so forth. Any ideas? Send me a pm if you need more info 343.