Why doesn't the animation work after the second click?

Question

css

All the best!
I decided to play around with angular and bootsrap.
In index.html I include:

bootstrap.css,
my.css,
angular.js,
angular-animate.js,
ui-bootstrap-tpls.js,
app.js

Then

var myApp = angular.module('myApp', ['ui.bootstrap','ngAnimate'])...

I use off bootstrap example

modal

from here
As a result, everything works only once ... that is, I click on the button to open the modal , and it works only once, the second time after I opened and closed the model window, after clicking on the button nothing happens.
I don't understand what is the reason

Answer 1

I just noticed that in safari there is no such problem, in chrome there is a problem