Those things seem to trigger at turn's end or the next turn. At least for me playing Chaos horde.
For those people who wish 0 skill points after unlocking all your skills, all you need to do is change the skill points to 0 for the trainer and go back to game and use it on all your lords and heros and they will have 0 skill points.
Uh, yeah. That is why I said "so there wouldn't be need to go back to customizing it to 0 skill input". Having to alt+tab to trainer every time it happens is bothersome.
Thankfully TW:W runs fairly smoothly so tabbing out isn't that much of a job, but it could be done in a more convenient manner with 99/0 option.