I tested this in my save and I no longer see this issue.
I will mark it as fixed.
I was watching the computer screen, when my sim was playing the game, and it appears, that when she was doing task with a guitar, that creativity skill got boosted. I have 4 children in that family, and it happened to all of them, the skill didn't go down after, it stayed maxed.
In my previous family with 3 children, one child had social skill boosted by the Keyboard Commander, but sadly don't remember if any of the other two children had it happen as well.
Just wanted to add that this just now happened in my fully updated game where a child playing Keyboard Commander gained Creativity skill rapidly, so it's an ongoing bug. Sorry if this counts as thread resurrection!
ETA: Just had another child with Mental skill 9 browsing Simpedia start gaining Motor skill rapidly in the same exact way. The bug continues!
Thanks for the feedback on this
EDIT: Funny enough it just didn't happen on my game today .. Seems more random now.
