my country codes data tool is acting like a grumpy old man

hey everyone, hope you're all having a less frustrating day than me!

we run this neat little web tool, 'Country Codes Directory', it's supposed to be a super helpful international phone, calling, dialing, and ISO codes resource. but lately, this thing has decided to develop a personality... and it's not a good one. it's acting like a grumpy old man who lost his glasses, specifically when it comes to our core data tools functionality.

the main issue is how it handles filtering and display for specific country data. sometimes:

• searches for common countries (like 'Germany' or 'Japan') return incomplete or totally incorrect ISO codes.
• the 'dialing code' field occasionally just shows 'null' even for well-established entries.
• and the worst part, sometimes it just randomly reorders the whole list without any user input, making our users think they're going crazy.

i've tried a few things already, thinking it might be a simple fix:

• checked the database for data integrity – everything looks fine there, no obvious corruption.
• cleared server caches and Cloudflare cache multiple times.
• re-indexed the search functionality (we're using a custom search script, not just basic SQL LIKE).
• even rebooted the server, just in case a cosmic ray hit it.

none of that really worked. the problem seems intermittent, which is the most annoying part. it's like the tool decides to behave itself for an hour, then goes back to its grumpy self. has anyone experienced something similar with complex web directories or data tools that seem to have a mind of their own? any tips on debugging intermittent data display issues or odd sorting behaviors? also, i'm really hoping someone's got a fresh prespective here.

thanks in advance!