exported images do not have metadata
Submitted by pdknsk
Assigned to poppler-bugs
In particular ICC profiles and XMP. While XMP isn't essential, ICC profiles are for color accuracy.
For JPEGs, it's relatively easy to patch a JFIF header into the file with the ICC profile.
Of course this doesn't solve the problem for other image types.
At the very least, a warning should be printed to alert the user about this.