Well, JR. This can be read in several ways.
Some will suggest that he joined NWBO on a research mission, made his findings and then returned to his former employer.
That could be a plus or a minus for NWBO, depending on whether they were in on the idea or not.
Or he could have decided he made a wrong career move.
Or another reason altogether.
Kind of unusual to leave a BP, go to a small bio and then go back to the same BP in a relatively short time period, I would suggest.
Unlike you, I won't make any conclusion in any direction, other than acknowledge it as interesting!
Good spot though!