If you click on the image description in the Wikipedia Preview gallery, or if you try to scroll image once zoomed in and touch the image description, a TypeError shows on on console.
Uncaught TypeError: image is null
zoomStart webpack://wikipediaPreview/./src/gallery/gestures.js?:163
applyGestureEvent webpack://wikipediaPreview/./src/gallery/slider.js?:244
applyGestureEvent webpack://wikipediaPreview/./src/gallery/slider.js?:239