When you hover with the mouse pointer over a staff member, do the tool tips appear, you wait for ~2 secs and then press the hotkeys?
i experienced the same thing when i activated the *instant training option and left it on for a bit... noticed that after 2 training sessions there was nothing left on the available courses, so i ended up restarting the map since progress was blocked as a result.
on my second playthrough of the same map, this time i started a training session, activated the cheat (causing the session to complete immediately) and then i turned off the cheat promptly. This didn’t cause any problems so far and i’ve been using it the same way ever since.
Easily reproducible - just activate "Instant Research" on the Mitton University scenario, and you'll fail ranking up as the current Research Points go waaaay into the negatives.