I cecked the whole pose-file all translate x, y, z deleted some NON -ZEROSs at the feet. saved it and tried again the same effect.

As you can see in my new scrrenprint it is the same V3 +bra und I can change from one pose (by marforno) and my customized pose...

With my (now checked pose the distotion happens, and a monent later everthing the same, with mafornospose on the the sanme V3, same bra... the distortion is. Then again my pose > distortion and so on....