original image 152x152

Thumbor request URL

/unsafe/fit-in/320x200/...
/unsafe/fit-in/320x200/filters:fill(aaa)/...

Expected behaviour

The image should be upscaled to 200x200 to fit in 320x200 frame preserving aspect ratio.
If fill filter is used, then it should upscale to 200x200 with 60px padding on right and left to create desired 320x200 image.

Actual behaviour

The image stays in original size 152x152 as if no_scale filter was applied.
If fill filter is used, then original size 152x152 is padded to 320x200 (padding all over the original image)