Same spaghetti sauce recipe for over 30 years

I’ve been making the same spaghetti sauce for over 30 years and everybody loves it! But,the last 6+ times that I have made it it tastes acidic. I can’t figure out why. It’s a very Basic recipe using tomato sauce, a can of whole tomatoes, a can of tomato soup to cut the acidity ( I know that sounds weird but it works) onion garlic, etc I use a little chicken broth and red wine if I have it handy. I always use my Dutch oven to cook it. I add meat balls the last hour or so. Does anyone have any idea as to why the flavor is different now??