Workflow - Is there a way to compel the user to add a new comment before changing the state of an issue?

Hi,

Is there a way to compel the user to add a new comment before changing the state of an issue?

This is how I have modeled my rule:

rule User should add comments while changing the state of an issue

when issue.State.changed {
    assert comments.added.isNotEmpty: "Please add a new comment";
}

This only forces the user to add a comment only when the state is changed for the first time(Assuming that there are no comments entered when the bug is submitted).