[Front Office] Images in product page not functioning well in Leo theme

TL;DR

Search through the template folder of your theme (e.g. themes/bos_poeme/templates) for .default_image

Replace to .cover

Between the gap of 1.7.6.9 & 1.7.7.0, the ProductLazyArray class has changed a little bit (src/Adapter/Presenter/Product/ProductLazyArray.php)

For the variable name of product images, in 1.7.6.9, we can use cover to retrieve them

but start from 1.7.7.0, there is a new variable default_image for retreieving them

However, Fun fact is that you can still use cover to retrieve them in 1.7.7.0, the difference is still investigating