International dialing codes lookup broken!

just rolled out an update to our 'Country Codes Directory' web tool, adding more detailed info and a faster search to our directory. was hoping to boost user engagement.

the core international dialing codes lookup is completely borked for some countries. it's showing either 'no data' or incorrect codes, and users are already sending emails. i've been trying to fix this for hours and i'm completely stuck, truely.

here's what i've tried so far, really trying to narrow this down:

• checked the database directly; the country data and associated codes are definitely there and look correct.

• reran migration scripts to ensure no data corruption during the update.

• reviewed our API endpoints and internal functions that fetch the codes; they seem to be returning the right data when tested in isolation.

• inspected front-end JavaScript for any obvious errors in how it processes or displays the results. nothing.

• cleared server-side and client-side caches multiple times.

• tested across different browsers (Chrome, Firefox, Safari) and mobile devices; same inconsistent behavior.

specific symptoms are driving me nuts:

• searching for countries like 'Germany' or 'Brazil' sometimes returns accurate international dialing codes, but 'Japan' or 'Australia' gives 'no data found' even though they're in the DB.

• occasionally, a country will show a completely wrong dialing code, like a domestic prefix instead of the international one.

• the search bar itself is acting weird; sometimes it finds partial matches, other times it requires exact input.

i'm thinking it's either a weird indexing issue in the database that only affects certain query patterns, or maybe a subtle race condition in the front-end rendering after the API call. could it be a timezone thing affecting data retrieval? i'm grasping at straws here.

has anyone experienced something similar with a data-driven web tool? any unique debugging strategies or common gotchas for international dialing codes directory tools that I might be overlooking? i'm desperate for any insights. thanks in advance!