The only way to avoid this is to switch off 3d dice. This is a problem with the way character sheet rolltemplates work with 3d dice (or more accurately, dont work with 3d dice). With Roll20 dice, you cannot roll dice conditionally: you cannot have a macro that says, "if i need 2 extra dice in this situation, roll them." Character sheet rolltemplates have a sneaky way to get around this: it can choose which dice to display in chat. The extra dice are always rolled, but only shown if they are relevant to the roll. 3d dice unfortunately dont know the rolltemplate is hiding some dice - it just rolls all the dice the macro rolls, including those that are hidden. To summarize: character sheet macros often roll extra dice, in case they are needed, and hides them if they aren't needed. 3d dice dont know about this, and dont hide the extra dice.