IE 11 toolbox rendering issue after removing a widget from toolbox.

[Jay-Ben]

I'm using latest Knockout.js version (3.5.1)
Getting following error on reloading the toolbox after removing one of the tool Item . Exactly after executing the below function.
This issue occurs only in IE11

function removeToolboxItem(itemName) {
    **surveyCreator.toolbox.removeItem(itemName);**
}

[mbest]

To debug this, I need to have some code that reproduces the problem.