Transparent background of resized base64 encoded images changes to black

[OpenHelios]

The current version 9.9.4 of flying-soucer-core does not respect the transparent background of a resized image defined by an img tag with an src attribute containing a base64 encoded image of type ABGR. Normally the transparent background is also in the resized image, but the background changes excidently from transparent to black color.

The same works for an img tag with an src attribute containing an image filename. The transparent background works in both cases, if the size of the image is not changed by a different width or height attribute or a corresponding CSS definition.