I just tested on Switch and they try to walk over trapdoors if there is a safe solid block on the other side. I think it works the same way it does on Java: mobs don't pathfind to transparent blocks but they pathfind over them. They also have to see a safe block, a solid block far enough from the cat so it's safe for them. So when there is no blocks on the other side they won't walk to the trapdoors, but if they see safe solid blocks on the other side they try to walk to the solid blocks and walk over the trapdoors and fall. This is how the Java farms are done. I don't think this is a bug, I think it's working as intended.
Graviola20
I just tested on Switch and they try to walk over trapdoors if there is a safe solid block on the other side. I think it works the same way it does on Java: mobs don't pathfind to transparent blocks but they pathfind over them. They also have to see a safe block, a solid block far enough from the cat so it's safe for them. So when there is no blocks on the other side they won't walk to the trapdoors, but if they see safe solid blocks on the other side they try to walk to the solid blocks and walk over the trapdoors and fall. This is how the Java farms are done. I don't think this is a bug, I think it's working as intended.