According to Osho, while separating the subtle and gross bodies is generally safe, there is real danger if the physical body is weak or damaged: once contact is withdrawn, parts may begin to disintegrate, making reunion difficult or impossible. Hence Hatha Yoga disciplines the body to prevent disorder, and deliberate, skillful separation enables easy rejoining—whereas accidental separations are riskier.
If your body isn’t strong, pulling your “energy body” out can make the body start falling apart, so getting back in may fail—so do it carefully and on purpose.