Hi,
In the image component, we enabled dynamic media. When we select SmartCrop and Auto rendition, the image (V3) uses the srcset. When DPR=1, images are rendered according to image profiles and work as expected; when DPR>1, the srcset attempts to render high resolution images, causing issues such as the iPhone 12 Pro mobile device attempting to render a tablet responsive image. I have attached the screenshots below for your reference. Please refer the below blog as well.
https://livefiredev.com/srcset-not-working-getting-wrong-images/
DPR = 1 (Mobile Image is rendering as expected)
Iphone 12 pro (Since DPR=3, the browser wants to render the Tablet image instead of Mobile)