Subtractive pipe sweep issue - thin face left hanging

Hello,

I am trying to model a lip for a lid using the subtractive pipe operation. My goal is to create a sketch of the shape of the lip and sweep it along the inner edges of the previous operation. The result looks almost perfect however there is a thin face that sticks out in only one of the corners as shown in the image.

I tried to change orientation to frenet, and corner transition to round corner, i also redid the lidShape sketch multiple times with the same results.

As i am fairly new to freeCAD i assume i'm missing something obvious, but i've been banging my head for a while with no results. I have included pictures of the before and after the problematic operation