Oh man! If that’s true it’s definitely a bug! Rare items at level 100 shouldn’t be able to drop with less than 22FP. It would be a huge help to us if you could submit a bug report with a video showing it in game and note which OS you’re using. If you’re running any 3rd party tools or anything like that, it would be helpful to know.
We take the credibility of our systems pretty seriously, and would want to investigate if possible. Any info you can provide is hugely helpful.