Yes, CMS should do lossless optimizations no question. The problem here is that this is a photographic image, saved as a PNG, when it really should be a JPEG. Converting to JPEG is a lossy optimization, in addition to offering different features. It&#x27;s risky to have a general &quot;convert PNGs to JPEG&quot; or even &quot;convert all non-transparent PNGs to JPEG&quot; optimization rules built into your build process or as a CMS plugin