I can't get Tangent Relation to work

Hi,

I can't get a tangent relation to work on this sketch (the corner spline in particular). The sketch is on a plane. It is using one sketch that was Convert Entities and then offset. I am not sure why this is happening but i have seen it before. I can't get around it. I tried deleting relations but  still doesn't work. Does any one know what may be causing it. I have a coworker that has had the same experience.

Thank you,

Anton

SolidworksSurfacing