[2022] Never caught a single soul, What am I doing wrong?

This is my MO to trap:

I usually build a line of Large cages below ground which is one block below trapdoors on the ground.

Screenshots

So far the cows and bandits walked through it and fell into the traps but were never caught.

I only ever used Largest cages available, I assume this is the source of my problem so in that case can someone give me details as to entities caught using different traps available.