I have tested :)

DSM2 --> Transform by Sab converter dsm1 or Sab converter Dsm2) --> Moi, Onshape: No

DSM 1 -->Transform by Sab converter Dsm1 or Sab converter Dsm2) --> Moi, Onshape: OK

So modelize in DSm1 old! Or use the Pro version of Space Claim ! ;)