The United States Supreme Court has held that an "administrative freeze" placed on a debtor's bank account by a depositary bank did not violate the automatic stay because the freeze was temporary and the bank sought relief from stay to exercise its setoff rights. Citizens Bank v Strumpf (1995) 516 US 16.
However, to enforce a setoff of the frozen account funds, the bank moust prove that it has a right to the money under nonbankruptcy law and that this right should be preserved in bankruptcy under 11 USC §553. Hal, Inc. v U.S. (In re Hal, Inc.) (9th Cir 1997).
The typical example is where the bank requires a deposit account as security for a separate credit line. If this does not apply to your facts, then it's likely that the bankruptcy trustee will move to force the bank to release the hold and the money will become part of the bankruptcy estate, to the extent that the assets are nonexempt under Washington law and the facts of your case.
Hope this helps.
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