Fixed undo redo cyclic dependency bug

Editor assessment

The subject names the defect: a cyclic dependency bug in undo and redo. The fix type matches, and the affected mechanism is identified, though the failure scenario — which actions produced the cycle — is left unstated. No scope is present. There is no body to supply that scenario or explain the correction strategy, but for a defect whose headline identifies the broken mechanism the message remains understandable without the diff. No footers appear. The past-tense Fixed and capitalized phrasing are minor hygiene notes.