I have narrowed it down to I believe just KW Rocketry. Dmagic Orbital science works.So the bug is this: I launch a rocket using kwrocketry parts, it builds them fine. No problem. But when I recover at the end, I do not get any of those parts back. Stock parts, they get added to my inventory as they are supposed to. Hope you can find a fix and thank you for reading! Edit: Here is the log on a second world I created to test if it was just the save. I got to the kwrocketry parts and it did not recover again. Hope this helps! https://www.dropbox.com/s/pco7dibc3jfcz7o/output_log.txt?dl=0