Everyone has a creative comfort zone. A place where they feel “safe”, or they keep returning to explore. Maybe it's a way you tell a story. Maybe it's a certain type of story. Maybe it's a combination of these.
One of my writers would start with a flashback. That's how they always started their early tales, and it wasn't until I brought it to their attention that they realized it and worked hard to change it.
Another of my writers wrote a lot of revenge tales because they found them easy. They also didn't realize what they were doing until it was brought to their attention.
For my own part, I've given a lot of thought about religion. I've found myself exploring different facets of religion, with thoughts of reality and the place of Life within the universe.
Falling back on your creative tropes is easy. If your subject is large enough, you can mine it for years, exploring different sides of it. The ease of it, the comfort of it, doesn't bode well for your creativity because you aren't stretching yourself. In order for you to grow, you have to stretch your creative muscles—without doing this, there isn't any reason to call yourself a creator.
Getting out of your comfort zone can be frightening because it's opening you up to a greater possibility for failure/rejection. It isn't territory that you've charted well. You don't know how the public will react to it. However, without at least attempting to grow, you won't have any facility in telling different types of stories, which will only reinforce you staying in your comfort zone, which will only keep the cycle going.
Break out of it. Do something different, and keep doing something different until you feel comfortable with it.
Lots of practice. As with anything else, this is the only way to get better.