Bricks Version: 1.3.3
Browser: Chrome 90
OS: macOS
Using a shape divider on a container with a background image - the shape displays in the builder but not on front end.
What happens if you click the “Front” option under the “Fill Color”? In my case, it brings the shape divider in front of the element. I don’t know if it works all the time, but it works for me.
Tried that but still not working - thanks for the suggestion though
Sorry it didn’t work. Wish I knew more. Maybe someone will have the answer soon and we can both learn more. 
So I ended up having a 2nd shape divider below the first one that wasn’t set - I removed it and now all works fine.
Oh, I hadn’t thought of that at all. Something I guess I should keep a watch on while I’m doing my thing. Thank you for updating the thread. I appreciate knowing.