PowerBI Embedded report stuck on loading sometimes

Hi all, I'm trying embed report on my Website. But sometimes iframe stucks on loading sometimes is working.

Below is my config :

var configR_desktop = {
        type: 'report',
        tokenType: models.TokenType.Embed,
        accessToken: TokenReport,
        embedUrl: UrlReport,
        id: embedReportdId,
        pageName: 'ReportSection',
        settings: {
            filterPaneEnabled: false,
            navContentPaneEnabled: false,
            localeSettings: {
                language: "en"
            },
           background: models.BackgroundType.Transparent
        }
    };

 And I need to refresh the website until embedded report working,

Everybody knows What's wrong with that? I would appreciate.