クリエ飛行を利用した二段ジャンプの不具合

on flight toggle:
    if player's gamemode is not creative:
        if player's flight mode is true:
            set player's flight mode to false
            set velocity of player to new Vector 0, 0, 0
            push player forward at speed 0.9
            push player up at speed 1.1    
    
    
    
every a ticks:
    loop all players:
        if loop-player is on ground:
            set {W.jump.%loop-player%} to true
            set loop-player's flight mode to true

on flight toggle:
    if player's gamemode is not creative:
        if player's flight mode is true:
            set player's flight mode to false
            set velocity of player to new Vector 0, 0, 0
            push player forward at speed 0.9
            push player up at speed 1.1    
    
    
    
every a ticks:
    loop all players:
        if loop-player is on ground:
            set {W.jump.%loop-player%} to true
            set loop-player's flight mode to true