Ensure no Redstone torches are nearby that might accidentally keep the Pistons extended. To help you get this done faster, let me know: Are you playing on Bedrock (Console/Mobile) or Java (PC) ?
Walk through the trap yourself (the Pistons will fire, but you can walk out if you're fast) to lure the mob into the center. lovely craft piston trap achievement guide
This prevents mobs from jumping out once the Pistons push them up. Ensure no Redstone torches are nearby that might
Dig a 1x1 hole in the ground where your Pressure Plate will go. This serves as the "bait" center. 2. Position the Pistons Place four Pistons around the center hole, facing upward. lovely craft piston trap achievement guide