No details, but he offended a costar on the set of his latest movie and production is shut down. Here he is reflecting solemnly on it, at the Berkshire Hathaway annual conference of all places:
https://www.cnbc.com/2022/04/30/bill-murray-reflects-on-inappropriate-behavior-that-led-to-the-shutdown-of-his-latest-film.html
One underrated thing about Bill Murray: His posture. Consistently excellent.