Oops! Another lawyer leaving the White House https://www.nbcnews.com/politics/white-house/white-house-ethics-lawyer-stefan-passantino-leaving-administration-n905031
They may have made their decision after completing their regular Bar-mandated ethics refresher course.
It's not unusual for people to work in these positions for just a year or two and so it doesn't automatically mean something nasty but, of course, context counts and so the timing of these departures is at least interesting.