Non transparent background on drag image

[acurrieclark]

I am seeing an issue on iOS where, if I set a drag image using setDragImage(svgImageElement), the background of the drag image is filled in white.

DragImage.video.mp4

The included video is the result of me initiating a drag and then releasing it in the same spot a few seconds later. It has been slowed down slightly to allow you to see what is happening. The svg is a small white box with some text behind.

What is doubly odd, is that when the drag image is added, the image itself (the svg with the transparent background) fades in first, then the white background follows.

I have been trying to find where in the codebase this might be happening, but I am struggling to narrow it down. I would be most grateful for some pointers.

Many thanks