I've encountered a bug. In the quest "Flight Test" I'm told to talk to Imalda Reyes on the quidditch pitch. I started the quest and wrecked immediately so I thought I could easily restart it by "abandoning" the quest.
My mistake. I was warped back to the start and now I can no longer talk to Reyes and still have the quest in my journal. I've moved on since hoping it would pop back up but I'm level 25 and pretty deep into the story now so seems like I've forever locked the broom upgrades behind this bug.
I also love to collect everything in this game so this will prevent me from completing every side quest. I'm in too deep now to restart completely but this is a bummer. I reported the bug to WB but I doubt anything comes of it.
ETA: on Xbox. Already uninstalled and reinstalled the game to try and fix it. Also rebooted console obviously.
CNN is an enemy of the state and should be treated as such.