Cannot Override MP templates

Images aren't getting displayed when trying to override a single product page with variation.

https://welcomeevolution.com/westore/produkte/life-restart-premium/
Template: mp_product-life-restart-premium.php

However, overriding is working fine with single product page without variation.
https://welcomeevolution.com/westore/produkte/die-zwei-in-uns/
Template: mp_product-die-zwei-in-uns.php