The page does not display properly after exiting an external application

[WeeAnalytic]

Greeting,
I put the Power BI app on the page.
The application can be displayed in full screen. The problem occurs after exiting full screen.
The page does not appear in its original form, nor does the menu.
I am submitting the attached image.

How to prevent this from happening?
Thanks in advance and best regards

[bobafett]

@WeeAnalytic get rid of the app or ask the app developer.

[WeeAnalytic]

The app is the most important so I can't remove it.
I wasn't sure why the weebly the background changes after minimizing the app. Thanks anyway