Why does IE freeze when calling Vue.delete?

Question

Vue.js

There is a reactive object

obj: {
    key: {
        key_a: value_1,
        key_b: value_2,
        ....
    }
}

There are approximately 50-60 key-value pairs in key.
when calling Vue.delete(this.obj, key) IE just freezes. What could be the problem and where to dig?

Answer 1

Open the console in IE and see an error, what else to dig?
Or take some tool to collect errors from the browser without a console: https://jsconsole.com/