Yeah, I've definitely had times when I had a Perception check and then couldn't figure out what I'd allegedly spotted. Needs improvement.
I think Larian wants these brief perception check animations to be a hint for further investigation, not a full explanation of what happened.
Sometimes it's explicit, like a successful check showing a brief glow highlighting a gas vent on the floor. Other times, we're expected to hunt around the area with the mouse to see what shows up under the mouse pointer, like a classic 2D Adventure game. Sometimes that works, but other times what we're supposed to find might be hidden from view due to camera rotation.
I like that we need to do a little work scanning the area sometimes, not just hitting the Alt key for a pop-up. But it needs to be a little easier to mouse-hunt for the reason in some of these locations.