I've noticed something similar to what you describe, it happened at Palma de Mallorca airport when selecting the arrival and various other airports-

I could choose the arrival STAR, BUT when I chose ILS RWY24L and hit activate and execute nothing happened...
It was only later I discovered the CS757 doesn't like you choosing any runway choice with say ILS in front.

Now I just choose RWY24L and that's it works fine.

Maybe if it's not the TOD bug it might be what I was getting.