Rummikub Joker After Replacement
If the Joker has been replaced then there is no joker in the meld.  That would remove the condition of "If there is a joker in a meld..."

Maybe the key definition is that it says "is" not "was"

There are multiple different sets of rules for Rummikub, so it would be beneficial to link the rules being used if this answer does not suffice.