I fixed the recruiting issue.
Due to yesterday changes, the skills weren't set anymore on hiring and thus the newly recruited player was getting the last skills set, whatever they were.
I double-checked if the skills could still get reset later on, but I couldn't find anything, so if you notice your player skills are reset again, try to notice what triggers it so I could reproduce it on my PC and fix it...

New SubBuild today : 2019.1.23 .
