Removing color from ofVboMesh has no effect on drawing

I tried to remove color from ofVboMesh's color array and it seems to have no effect on drawing whereas if I use ofMesh, it works correctly.

Here's a test code below.

in ofApp.h

ofVboMesh mesh; //ofMesh works correctly but not ofVboMesh.

in ofApp.cpp

//--------------------------------------------------------------
void ofApp::setup(){

mesh.addVertex(ofVec3f(0,0,0));
mesh.addVertex(ofVec3f(100,0,0));
mesh.addVertex(ofVec3f(100,100,0));
mesh.addVertex(ofVec3f(0,100,0));

mesh.addIndex(0);
mesh.addIndex(1);
mesh.addIndex(3);
mesh.addIndex(1);
mesh.addIndex(2);
mesh.addIndex(3);

mesh.addColor(ofFloatColor(1,0,1,1));
mesh.addColor(ofFloatColor(1,0,0,1));
mesh.addColor(ofFloatColor(0,1,0,1));
mesh.addColor(ofFloatColor(0,0,1,1));
}

//--------------------------------------------------------------
void ofApp::update(){

}

//--------------------------------------------------------------
void ofApp::draw(){

ofTranslate(50, 50);
mesh.draw();
}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){

if (key == OF_KEY_RETURN) {

if (mesh.getNumColors()) {

    size_t lastIndex = mesh.getNumColors()-1;
    mesh.setColor(lastIndex, ofFloatColor(0,0,0,0));
    mesh.removeColor(lastIndex);
}
cout << "numColors : " << mesh.getNumColors() << endl;

}
}

And this is the result you get when you run the code.

And when you press the 'return' key, last color should be removed from the color vector. For example if you press the key twice, the result should look as below.

But if I use ofVboMesh, removing color from vector doesn't have any effect on the drawing until the vector gets emptied.

it seems the vbo is not being refreshed when ofVboMesh's color vector is changed through remove.

Also, I think it would make more sense to automatically make the color cleared to ofFloatColor(0,0,0,0) as soon as color gets removed from the vector.

Meaning, the code should still work even without "mesh.setColor(lastIndex, ofFloatColor(0,0,0,0));" in ofApp::keyPressed(int key) {}

Start with the supplied ofApp reproduction and compare ofVboMesh with the working ofMesh behavior, focusing on removeColor, setColor, and draw. Verify that removing colors refreshes the VBO data and that drawing reflects each removal before the color vector is empty.