My 200 dweller shelter is doing pretty well, but for a day or two, training rooms don't add any s.p.e.c.i.a.l. points anymore. After the countdown for training is done, the symbol for training complete appears, but the points just won't increase. I am 100% sure as I observed a dweller from <1min until after the "level-up" - no point added for the s.p.e.c.i.a.l. stats.

Any way to fix this?