I'm not sure about OP, but for me it isn't a bug... I'm just really bad at this sort of thing :< My reflexes aren't good enough, I think.
I run as fast as I can, and I do kind of okay at first, but when going around the corners, I inevitably slow down and she gets me... I think I tried around 20 times, and then quit the game.
I was terrible at the spikes puzzle, too. I couldn't beat it even once and had to skip each time.
It would be great to have either a "Skip" button or an alternative solution for those like me who are too slow XD Perhaps a way to cover her face, so she can't see you grab the black item? Or a way to make her fall into the dungeon room below since there's a very convenient hole in the floor...
I suppose this would apply to all similar "speed" puzzles. They're very, very hard... if you include any more in the future chapters, a "Skip" button after a few failed tries would be much appreciated! 😭
Edit: I was looking for another way (since there always is one), but burning the painting isn't good either... she's faster than fire! XD