The All In game uses a solenoid to lock the handle in place when the game is not coined up.
When the solenoid is disengaged the latch is up preventing the handle from being pulled. When the latch is up it should be resting flat against the Latch block, if the block has shifted or has worn it will allow the handle to be moved when the game is in attract mode. The part number for the replacement block is FE3045.