Joseph: You are confusing the gebrokts story with the syory about the second rebbetizin not knowing his minhag not to eat cheese on erev shabbos and she made a milchigs kiddush on Shavuous for which he was matter neder so he could eat the cheese.
Wolf: His family minhag was and is to eat gebrokts. He personally did not as he one time did not want to eat in someone’s house and stated he did not eat gebrokts.
Both of these incidents are mentioned in the biography published by AttScroll.