Properly size images being triggered despite image with correct width available in srcset for devicepixelratio for Moto G4

#### Provide the steps to reproduce
1. Run LH on https://cmm4.guruslabs.com/product/classic-womens-hoodie/ (see LH report url below)
2. Observe a **Properly size images** opportunity for one image
The image in question has many images available via srcset/sizes including one specifically aimed at satisfying the Emulated Moto G4 viewport.
- the image size is 330px on the Moto G4 viewport, and I believe the G4 has a devicepixelratio value of 3, so I created a version of the image with a width of 990px

LH Report
https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Fcmm4.guruslabs.com%2Fproduct%2Fclassic-womens-hoodie%2F

#### What is the current behavior?
An image with a width of 1074px is being loaded

#### What is the expected behavior?
I expect the G4 to load the image with a width of 990px and for this audit to be passed.

#### Environment Information
* Lighthouse version: 7.3