pThumb removes iptc metadata

Is there a way to tell pThumb to keep or copy IPTC metadata, like copyright etc. into the resized images?
Seems, they are removed after resizing.

This is on a MODX 2.6.5 installation and pThumb 2.3.3-pl

Found a long discussion about that same issue on the contao repo.
IPTC/EXIF metadata get lost when resizing images in Contao · Issue #80 · contao/image (