[Risolto] Problem with ATE

Background of the issue:
I have two installations of WordPress, one for staging and one for production. I am translating the staging version of the website into 4 languages using WPML. I have increased the wp_memory_limit in the wp_config.php file to 256MB as per the documentation at link nascosto.

Symptoms:
Every time I change anything on the original page, the translated pages disappear or display a messy page with mixed languages. The ATE gets stuck when I try to save translations, and the WP site health tool shows the memory limit under WORDPRESS CONSTANTS tab as 40MB.

Questions:
Is there anything else I can do to make the translations work properly?
Sould I change the memory limit under WORDPRESS CONSTANTS from 40MB to 256MB and how?