UE4 Export render target on android

Exporting a render target on android creates a png file that appears to be not valid. The exact same blueprint works fine on windows.

Any ideas if the Export Render Target node should work on mobile?

I am using v4.23 launcher edition... I have tried v4.19 as well, with the same results, using a clean project.

The last attachment is the png that gets exported...

Solution

After I submitted it as a bug to Unreal, they were able to reproduce the issue. So it is a bug...

Here is a link to the issue tracker