some android system render dicom different or break down when set webgl

[ifunplus]

if you find the same problem,you can change this:

cornerstone.enable(element, {renderer: "webgl"});

to: cornerstone.enable(element);

System supports webgl，but in some android devices, the canvas shows different, not as good as in computer.

no wbgl:

webgl:

Dont know why. Does anyone know the reason? Thanks so much for giving me some clues