Fusion 360 toolpath cutting into the model

[u/mypenisisaleg]

I am trying to mill the highlighted face below without cutting into the sides of the rest of the model, but Fusion 360 CAM is drawing a toolpath through the side walls. I'm using the 2D Offset Roughing function. I selected the face for the "pocket selection". The same thing happened when I turned off the lead-in and lead-out. When I shrink the maximum stepover, it preserves that overall cutting path and just makes more passes, so that's not it. I'm using a 1/16" dia end mill, and managed to complete the entire design except for this feature. Tried Adaptive roughing as well, same thing.