Wrong background

Hi team. I faced a new issue with a wrong background in one of our decks, could you advise? Here you can find a sample project:
https://drive.google.com/file/d/1frq0xhBkzaoZ7NwKrRVgOXgM6jj7NORp/view?usp=sharing

@obrusentsov

I have created an issue with ID SLIDESNET-42202 in our issue tracking system to further investigate and resolve the issue. This thread has been linked with the issue so that you may be notified once the issue will be fixed.