After acquired title applicable to Beneficiary Deeds in Oklahoma

Issue - Is the doctrine of after acquired title applicable to Beneficiary Deeds in Oklahoma?

Facts
A creates a family trust conveying real property into the trust, naming A as trustee, and B and C (siblings) as joint beneficiaries ;
A subsequently amends the trust naming only B as beneficiary;
A then executes and records a beneficiary deed in her individual capacity (no mention of trustee) to B;
A then executes a Warranty Deed, as Trustee to A as an individual, shortly thereafter she dies.
Question, did A die intestate or did the property pass to B by reason of beneficiary deed?