The issues of slavery at the constitutional convention was actually an issue about ?

Representation, is the right answer.

Explanation:

While drafting the first U.S. Constitution, the northern and the southern states dissented about the practice of representation of serfs in the House of Representatives. The northern did not crave the southern to be permitted to include slaves in their total population. Since it was the number of residents in a state that decided the number of delegates that a state could assign to the House of Representatives.