If Threads freezes right after opening or crashes immediately, start with the basics: force-close the app, clear its cache (Settings → Apps → Threads → Clear Cache), and relaunch. If that doesn't help, check whether your OS is up to date — outdated Android or iOS versions often conflict with recent app builds. Reinstalling usually fixes persistent crash loops.
When the feed gets stuck and new posts don't appear, it's almost always a connection issue or a stale cache. Toggle airplane mode on and off to reset the network stack, then pull down to refresh. If the feed still won't update, switch from Wi-Fi to mobile data or vice versa — this alone resolves it in most cases.
A failed login on Threads typically falls into one of two scenarios: wrong credentials or a session conflict from another device. Try resetting your password through Instagram (the accounts are linked). If you're getting a generic error with correct credentials, log out of all active sessions via Instagram's security settings and log back in.
If replies or DMs get stuck in 'sending' state, the problem is usually an unstable connection or a background sync restriction. Make sure Threads has permission to run in the background (check battery optimization settings on Android). On iOS, go to Settings → General → Background App Refresh and enable it for the app. If messages show as sent but aren't received, the recipient's account may have notification delivery delays — nothing you can fix on your end.
Broken search is often tied to a regional index lag or a corrupted local cache. Clear the app cache, restart, and try again. If searching for a specific account fails, make sure you're using the exact username without extra spaces — Threads search doesn't handle fuzzy queries well yet.