Legal Question in Criminal Law in California

No. Not misconduct. Just poor police practice. But if he told you the court date, you must appear to avoid an arrest.warrant being issued. If you don't know the court date, check the court calendar system to find out, and then appear. You can tell the judge your story once you do appear. You can ask but but don't expect to have the case dismissed or 'affected' by the officer's omission.