Does anyone know why the Groove Bead Weldment Feature is behaving inconsistently?

this one section of 12 that need a Groove Bead, will not behave correctly. I am using the same exact parameters in the Property Manager each time. 

The remaining 11 Groove Beads are not behaving like this one and are instead giving me what I want, which essentially a bridge between the geometry of both bodies without any twisting of edges.

The end result looks like this.