Image Size Change After Update to 3.6.2

Hello, I am using Storefront theme for one of my client with Galleria Pro child theme. When we updated the the woocomerce plugin to 3.6.2 all of the catalog & product images got shrink from top and bottom. This is how the code became after the update for catalog images

<img src="https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67825951_s-577x684.jpg" alt="Blouses" width="684" height="684">

The Code before the update
<img src="https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67825951_s.jpg" alt="Blouses" width="684" height="684" srcset="https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67825951_s.jpg 577w, https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67825951_s-501x751.jpg 501w, https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67825951_s-200x300.jpg 200w" sizes="(max-width: 456px) 100vw, 456px">

For products<img width="577" height="684" src="https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67826737_s-577x684.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="">
Before the update
<img width="456" height="684" src="https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67826737_s.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" srcset="https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67826737_s.jpg 577w, https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67826737_s-501x752.jpg 501w, https://woocommerce-220815-794625.cloudwaysapps.com/wp-content/uploads/2019/03/Depositphotos_67826737_s-200x300.jpg 200w" sizes="(max-width: 456px) 100vw, 456px">

Kindly advice how can i fix this. Much appreciate the advice.

Thanks everyone.