Lossless jpeg xl images not rendering correctly in Preview on macOS 15.7

I have created a number of jpeg xl saved images to reduce storage space. These clearly are lossless by looking at them at extreme zoom levels in a range of applications. These images were not photographs but test patterns. While I have the originals I have not lost any content I do find it frustrating that the preview application in 15.7 and earlier cannot render lossless jpeg xl correctly. Clearly the chroma bandwidth has not been recreated. The result is that colours leak out in to each other and white areas. Why is this. Safari for example seems, as far as can tell, to have no such problem rendering lossless jpeg xl. Generally preview is excellent for that very purpose as a preview to judge quality, in this case it is not.

[Re-Titled by Moderator]

Original Title: jpeg xl lossless