Hard clean my build folder did the trick for me ! Thanks @Claude31. I did so by going to the "Product" tab in the top bar, then click "clean build folder" while pressing ALT for a hard clean.

Hey @kka, it seems like you finally found a solution to make your chart zoomable. Would you mind giving us a better insight about the logic you've used to achieve that ? That would be very nice, because I fail to grasp it. Thanks !