Photoshop Mix Transparent background issues

[Good4YouGuy]

I have been using the Photoshop Mix app for over a year, with no issues.  Now, all of a sudden, my transparent backgrounds on my PNG files are showing up as white in the app, not transparent.  What is the issue?  Did some update screw this up?  How can it get fixed?

Thanks for your help.

[Lars Nyquist]

I have the same problem after updated IOS,