IPX doesn't apply to data-src

Hi,

I am using nuxt-lazysizes on my project. 'lazysizes' uses data-src for original image When image is visible data-src attibute replacing to src attribute. If you put the src attribute at the same time, src attribute uses for placeholder image before replaced.

Simply like this (without nuxt-img):
<img class="lazyload" src="loading.svg" data-src="my-original-image.jpg" /> // Input
<img class="lazyloaded" src="my-original-image.jpg" /> // Ouput

When i using nuxt-img component with lazysizes (data-src) doesn't applied ipx provider to data-src. nuxt-img renders original path after loaded lazyload img (after replacing data-src to src). Ipx applies to only src attribute but that is placeholder image in this scenario.

(✔️ Not lazy, it works. Applies ipx )
<nuxt-img src="https://mycdn.com/image.jpg" format="webp" /> // Input
<img src="/_ipx/f_webp/https://mycdn.com/image.jpg" /> // Output

(❌ Lazy (data-src), doesn't work. Doesn't applies ipx after loaded lazy image. Applying only src)

Input

• <nuxt-img class="lazyload" src="/loading.svg" data-src="https://mycdn.com/image.jpg" format="webp" />

Output, before lazyloaded

• <img class="lazyload" src="/_ipx/f_webp/loading.svg" data-src="https://mycdn.com/image.jpg" />

Output, after lazyloaded

• <img class="lazyloaded" src="https://mycdn.com/image.jpg" data-src="https://mycdn.com/image.jpg" />

src is not provided with ipx after lazyloaded for lazy img.

In addition, i am using ipx provider for my external cdn images.

• "nuxt@2.15.7"
• "@nuxt/image": "^0.6.2"
• "nuxt-lazysizes": "^1.4.0"
• Webpack
• SSR

Start with the nuxt-img rendering path and IPX provider behavior, reproducing the supplied lazy and non-lazy examples with nuxt-lazysizes. Done means a lazy image's data-src is transformed through IPX so that, after lazy loading, the resulting src retains the expected optimized URL rather than the original CDN URL.