Thanks that worked.
Except when the uploaded image is the same size as one of the retina sizes.
I have one image size set as 1300×550
@2x is then 2600×1100
if I upload a file with exactly 2600×1100, it creates a file with “filename-1300×[email protected]” without creating a quality 40 version of it.
Can you force it to compress the image even thought it doesn’t have to resize it?