See the image below: why does the edge flow stop here?
I know the face is a bit distorted, but is this the reason, or is there something else happening?
The below is it fixed not sure why its fixed but, I'm happy I guess.
A Loop Cut (assuming that's what you're trying to do here) only works on quads, so the problem is likely that the faces the cut won't loop through are not actually quads.
What you can try to fix it, is to remove the current faces that don't get looped, and recreate them (by selecting only 4 polygons and pressing F). Then the Loop Cut operation should work.