So...
The factory that manufactures Big Barda put a large foam pad where the left leg goes inside the Styrofoam brick. It places a lot of pressure on the leg, causing it to break.
If you remove the foam pad, you can see that the brick adequately supports the leg just fine (not too loose, not too tight).
I repaired my statue by wedging it upside down inside the brick while waiting for the glue to dry.
Big Barda vs Wonder Woman