crop not working properly when using webp

[victorparrillamartin]

I'm having some problems when trying to use the package and get a cropped image on webp format. This is the code I'm using:

<img src="@Url.GetCropCdnUrl(Umbraco.TypedMedia(6402), cropAlias: "small", width: 300, height: 200)" />

<img src="@Url.GetCropCdnUrl(Umbraco.TypedMedia(6402), cropAlias: "small", width: 300, height: 200, furtherOptions: "format=webp")" />

And this is the result:

As you can see the first image is being cropped properly (300x200 px), but when trying to use webp on the furtherOptions the image is not being cropped as expected (300x168 px).

Could anyone shine some light on this? Thank you very much.