Activating a dispenser with a hostile mob spawn egg in Peaceful mode consumes the egg and plays a sound

Activating a dispenser with a hostile mob spawn egg in peaceful mode consumes the egg and plays a sound. Neither of these things happen when the player attempts to use the spawn egg normally.

To reproduce

1. Set the difficulty to Peaceful

2. /setblock ~ ~ ~ minecraft:dispenser[facing=up]{Items:[{Slot:4b,id:"witch_spawn_egg",count:64}]}

3. Place a button on the dispenser

4. Press the button
   ❌ You hear a witch cackle

5. Inspect the dispenser
   ❌ A spawn egg has been consumed, and only 63 remain

Expected behavior

The spawn attempt would have completely failed, just as it would have it you had used the egg yourself.