Hey there,
I’m still a beginner at all this, but I did some digging around and it seems that when you use a pole target, the limit rotations of the bones in the IK chain are ignored.
In this demonstration, since we are using a knee pole, it ignores the limit rotations in favor of always pointing the thigh in the direction of the pole angle. If you clear the pole target in the IK constraint, the limit rotations start working as expected.
I’m still really new to rigging, so more experienced users are more than welcome to chime in.
