If the map is created on negative latitud or longitude, using the control to zoom in or to zoom out, set the map center at the absolute values of latitud and longitud, so moving the center of the map far away.
I create the map this way:
var map = L.map('map').setView([-34.91355 , -55.04537], 9);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);
L.control.mapCenterCoord().addTo(map);
I would appreciate if you help me solve this problem.