“Just joining the other speculations already posted, some with even more detail.” (Moderator)
So true. It could have also been totally unrelated to you Lavender.
He could have realized that his conversion had some kind of glitch and he needs to commit more to his learning.
There could have been a family emergency, one that his rabbi was not permitted to disclose due to stigma.
Anything really… so also remember that when something personally happens to you, it isn’t necessarily personal.