Two out of three of the Sequel Trilogy films (thus far) have ended with the Force Theme. Out of all the issues with the Sequel Trilogy, this is one that really irks me. It made sense in the context of both The Force Awakens and The Last Jedi, but you’d think Williams wouldn’t be so repetitive.
And there is no doubt in my mind it will be the same case for Episode IX.
Williams ended Revenge of the Sith with it too. That means the last three Star Wars films have all used the force theme at the end. I agree, it would seem as one of the greatest composers of all time would avoid this type of repetition.