Modal show.mdb.modal event firing twice

The event is firing twice on "show.mdb.modal"

    <button type="button" class="btn btn-primary" data-mdb-ripple-init data-mdb-modal-init
    data-mdb-target="#exampleModal">
        Demo modal
    </button>

<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
                <button type="button" class="btn-close" data-mdb-ripple-init data-mdb-dismiss="modal"
                    aria-label="Close"></button>
            </div>
            <div class="modal-body">...</div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-mdb-ripple-init
                    data-mdb-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary" data-mdb-ripple-init>Save changes</button>
            </div>
        </div>
    </div>
</div>

Javascript:

const modalInstance = new mdb.Modal(document.getElementById('exampleModal'));
modalInstance._element.addEventListener("show.mdb.modal", () => {
console.log("Show modal");
});

Output:"Show modal" is showing two time in console

Snippet: - https://mdbootstrap.com/snippets/standard/mdbootramognee-com/6133664