One of the most distant galaxies known GN-z11 has been observed many times by JWST in it’s first few years of observations but that data isn’t as clear cut as we hoped.
There’s a debate going on (led by two camps; one in Cambridge and one in Oxford) over whether GN-z11 has a growing supermassive black hole or not.
Either way it has big implications for our understanding of how galaxies and black holes evolve together in the early Universe.