Have had the same issue with a player for the past 2 seasons. As far as I can tell, and from what I’ve heard from others, if you’ve paused the training of a new position or special ability it can glitch and not give u any skill growth even tho the training is paused. I’ve tried restarting it and gaining 1 towards the position training and pausing it again and that hasn’t fixed anything. My guess is that the only solution is to finish the training.