Grayscale PNG loaded as Black Images on iPad 4

I have a problem with grayscale PNG Images which are loaded as completey black Images only on iPad 4 with iOS 10. On newer iPads this problem doesn't appear.

The Images are loaded normally from the Filesystem. I also created a Bug Report but i dont get any answer. This Bug doesn' appear when i create a new Image from this grayscale Image with RGBA ColorSpace.

Replies

The same problem, looking forward to fixing!