Former Federal Reserve Governor Adriana Kugler abruptly resigned after Chair Jerome Powell refused to grant her a waiver to address financial holdings that ran afoul of the central bank’s ethics rules, according to a Fed official.

Kugler also faced a probe by the Fed’s internal watchdog related to her recent financial disclosures before stepping down in August, according to a document released Saturday.

Fed ethics officials declined to certify Kugler’s latest disclosures, which were posted on the website of the Office of Government Ethics, and referred the matter to the board’s inspector general, the document showed. The disclosures revealed details related to financial activity that appeared to violate the Fed’s internal ethics rules.

Kugler announced on Aug. 1 that she would res

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