Q: Can I install 1/2 in plywood over self-leveling compound on 3/4 in OSB before installing a hardwood floor?

I have self-leveling compond installed over 3/4 in OSB. I am installing 5 x 3/4 in hickory hardwood floor. I heard the compond will crack, at this point can I install 1/2 in plywood over this.

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