Same here… constant crashing on the Series S. I thought it was isolated to campaign mode, but it’s also happening in multiplayer now. The game crashes every 5-15 mins of playing, consistently. So if you’re getting a couple hours you’re lucky.
I’ve tried everything to fix this. Power cycled the Xbox countless times, removed the add-on files, deleted the cached local files, reinstalled the game, moved the game from external storage to internal. Nothings worked. Power cycling tends to help the most, I usually will get closer to the 15 min mark after cycling, but it ultimately still crashes.
My S is also relatively new, less than 6 months old. No overheating or dust issues.