While it is possible to access the website via Wi-Fi, it is showing a 503 error when using mobile data.

[cRen]

Hello friends. Due to a technical issue on the website yesterday, we have migrated to a cloud server and transitioned from cPanel to DirectAdmin. Currently, there are no speed-related issues with the site. While the site was showing a general 503 error, there were errors with Cron and Trash commands in the wpconfig file, which I removed from the config, and now the site is opening smoothly and has also significantly sped up. However, we are experiencing a 503 error when trying to access the site via mobile data. What could be causing this issue? The site is a WordPress site with high file sizes and traffic. Due to the mobile data access issue, we are currently experiencing a 60% hourly loss in users.