If you use the mode Automatic Translate Everything, WPML may use a higher resource on your site to scan all content and send them to translation. Please observe this issue, if it occurs over a long time, you can enable WP debug log and see if there is any error in the log and share it with me.
If you don't know how to enable WP debug log, please follow the documentation https://wordpress.org/documentation/article/debugging-in-wordpress/
I also need more information on your site by sharing the debug info. If you don’t know how to share the debug info, please follow this article https://wpml.org/faq/provide-debug-information-faster-support/
Your next reply is enabled to share the debug info.