Omar broke a LEGO piece recently while assembling 75524 Chirrut Îmwe's bowcaster.
It was a small piece and a tricky assembly. The instruction required for the piece, called a "2m cross axle with groove" functioning as a pin, to be inserted partially before fitting a separate part. Omar over-inserted the piece, and broke it while trying to pull it out. There was no spare.
Thankfully, however, it still works, so Chirrut has his bowcaster.
Just in case, I submitted a request for replacement on LEGO's website. It's on the way.
