Image alignment wrong in product description

You need to ensure you include WordPress generated classes in your theme, prior to using the classes. You may want to address this with your theme developer.

To quickly solve this issue, you can add custom CSS to your page:

img.alignright {
    float: right; margin: 0 0 1em 1em;
}

This is the expected result: https://ibb.co/MSfZgXc

Thank you.