"Hide DMD" in the Game Manager did the trick. Thanks again.
Another bug. When I launch a table for the first time, the virtual DMD appears on the playfield, and the playfield is stuck on loading (see pic attached),
Although after I exit and I restart, the table works normally (PF ok, no DMD on the PF, pin2DMD ok).
EDIT: (this strange behaviour doesn't appear on Stern tables, but does on others)