After updating from Magento Open Source 2.3.3 to Magento Open Source 2.3.4, I observe arbitrary behavior in the rendering of product images on the category view pages.
Before the update, the product images were displayed square in a fixed size. Images with different aspect ratios were scaled so that they always fit into the square format.
After the update to 2.3.4, the product images are no longer displayed in square format. The product images are now displayed with the aspect ratio of the source image.
Why does this arbitrary display of the product images occur? What has changed with Magento 2.3.4 and how can I change the size of the product images in the category view?
I'm using a older version of the porto theme, my
app/design/frontend/Smartwave/porto/Magento_Catalog/templates/product/list.phtml is available as a github gist
Many thanks for your help!