[BUG] Safari on MacOS blends image layers, where it shouldn't

[mudhoney]

Describe the bug
Multiple layers of images are being displayed blended on safari on macos,
where it should be displayed

To Reproduce
Steps to reproduce the behavior:

1. Go to shortlink https://helioviewer.org/load/3b2d86f2084ed4b6f6dfea0f07e301cef4d9769c134c44644c72c828c1021480

Expected behavior
Images should not be blended, they should be shown as different layers.

Screenshots
WRONG BEHAVIOUR

CORRECT BEHAVIOUR