Skript not working for all players

[Ceekay]

So i have this skript

every 20 ticks:
    loop all players:
        if {mana.%loop-player's uuid%} is equal to {manamax.%loop-player's uuid%}:
            stop
        else:
            add {manaregen.%loop-player's uuid%} to {mana.%loop-player's uuid%}

Yet when i try it only one player or some players have their mana regenerating some players dont even have their mana regenerating how do i fix this

 

[Luke_Sky_Walker]

So i have this skript

every 20 ticks:
    loop all players:
        if {mana.%loop-player's uuid%} is equal to {manamax.%loop-player's uuid%}:
            stop
        else:
            add {manaregen.%loop-player's uuid%} to {mana.%loop-player's uuid%}

Yet when i try it only one player or some players have their mana regenerating some players dont even have their mana regenerating how do i fix this

It is probably better to use list variables for your code (Ie: {mana::%loop-player's uuid%}). Also, make sure that if statement is passing for all players by debugging it.