Challenge and reward Bugs

I have few bug reports for obtaining attikus and receiving Mellka skins. To get attikus you must kill 800 Jenneritt troops or get rank 32. I reach 1000 kills through story mode and it took hours only to find out I don’t get him, even the challenge board didn’t show after the mission for some reason. Also obtaining a Mellka skin for launcher kills did not show in her appearance slot even though it wasn’t completed. Who knows what other challenge bugs there are

Are you sure that you killed Jennerit enemy? Just a thought

Yup, the thralls fell under that category