Fixed the issue where the challenge image was being cut off on smaller screens or inside smaller containers (< 320px width). The challenge will now scale according to the width available in case it's less than the 320px width of the challenge image.
Note that this solution, however, does compromise the quality of the image a bit on said smaller devices.
In the future, the image generation process might have to be revamped to fixed the blurry images and also introduce a different way challenges are generated/rendered on smaller screens / mobile devices.
Full Changelog: 4.0.1...4.0.2