If this is not a bug my apologies. I cannot see that my opponent has laid a trap and I cannot see the trap anywhere on the map.
No worries! It’s a genuinely great question.
You won’t know if it’s placed or if it is on CD. It’s good to watch out for certain phobies as quite a few of them offer different kinds of traps!
But to answer your question, that is as intended! I hope this helps!