I don't think you need to redisclose. This is based on the following commentary in Reg Z, Section 226.17(c):
17(c) Basis of disclosures and use of estimates.
Paragraph 17(c)(1).
1. Legal obligation. The disclosures shall reflect the credit terms to which the parties are legally bound as of the outset of the transaction. In the case of disclosures required under §226.20(c), the disclosures shall reflect the credit terms to which the parties are legally bound when the disclosures are provided. The legal obligation is determined by applicable state law or other law. (Certain transactions are specifically addressed in this commentary. See, for example, the discussion of buydown transactions elsewhere in the commentary to §226.17(c).)