Before proceeding further, can you please try the following?
Take a full backup of your site and database before proceeding. It is highly advised to try these on a dev or staging site first, so your live site isn't compromised.
1) Most importantly, update WordPress to the latest version. Also update WPML plugins, Elementor and other plugins/theme to the latest versions as needed.
2) Deactivate all plugins except WPML and String Translation.
3) Switch to a standard theme like 2024 or 2021.
4) Check for the issue if it still happens.
5) Then start activating plugins one by one while keep checking for the issue. This way you 'll be able to pinpoint a conflict when & where it starts creating the problem.
6) If after activating all plugins you see that it still works fine, then switch to your theme and see if that's causing it.
Please let me know your findings and I'll try my best to help you further on the matter.