Meteor checkbox always false after Template render

I have a navbar with 2 entries. One entrie is a checkbox and the other one is a dropdown with a button (I will provide code for that). The input has the id inputMode and the button addNewObject

 <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
        <ul class="nav navbar-nav">
            <li id="editMode">
               <a href="#">
                   <label><input type="checkbox" value="Edit Mode" id="inputMode">Edit Mode</label>
               </a>
            </li>
            <li><a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button"
                   aria-haspopup="true" aria-expanded="false">Scenegraph <span class="caret"></span></a>
                <ul class="dropdown-menu">
                    <li><div style="text-align:center;">
                        <input id="addNewObject" type="button" class="btn-success" value="Add Object">
                    </div></li>
                </ul>
            </li>

        </ul>
    </div>

For each of the id's i have click function's.

'click #inputMode': function (event, tmpl) {
    let isChecked = $("#inputMode").is(":checked");
    if (isChecked) {
       // do something
    } else {
      //do something
    }
},
'click #addNewObject': function (ev) {

    Helper.initSceneGraph();

}

So the thing is when i click the button addNewObject the navbar gets rerendered, like this:

static initSceneGraph() {
    if (Meteor.isClient) {
        Template.sceneGraph.helpers({
            sceneObjects: Application.getInstance().scene.sceneObjects,
            isAudio: function (obj) {
                return obj._soundPath;
            }
        });
    }
    UI.render(Template.sceneGraph, document.body);
}

So after the initSceneGraph the checkbox inputMode doesnt change. That means visually it changes, but intern it always stays the same. For exampleconsole.log($("#inputMode").is(":checked"); is either ALWAYS false or ALWAYS true, depending if it was true or false BEFORE clicking the button.

I hope someone can help me out with this!