I placed a lid on the stairs while the character was climbing the stairs, and the character needs to open this lid and climb up the stairs. There is a closed collider with a trigger on the lid. However, when the character reaches the lid while climbing the stairs, the character passes through the closed trigger as if it's not there. I checked this on the demo scene as well. If the character is moving upward, it can pass through the collider, and once it passes, it can't fall back from the collider it went through. What could be the reason for this?
