Hey! We’ll fix your Alexa sync issues and get everything consistent again across the Alexa app, Echo devices, groups, and routines. Quick questions so we solve the right problem (and not just reboot blindly):
• What’s not syncing — smart home devices (lights/plugs/thermostat), groups, routines, or multi-room music?
• What does Alexa say: “device is unresponsive”, “server not responding”, “No new devices found”, or are devices missing/duplicated in the Alexa app?
• Are your Echo speakers and your phone signed into the same Amazon account (and not different household profiles)?
• Which brands are connected (Philips Hue, TP-Link Kasa, SmartThings, Ring, Ecobee, etc.) — do they connect via a skill with account linking or via Matter/Zigbee?
• Any recent changes: router/mesh update, changed Wi-Fi name/password, new phone, new Echo, or enabled WPA3/guest network?
Share those details and we’ll do a fast step-by-step fix for Alexa devices not syncing.

That pattern is very common: devices work in the manufacturer app, but Alexa sync breaks. It usually comes from one of these:
• The Alexa app cache is stale (devices list doesn’t refresh) → duplicates, missing devices, wrong names.
• A skill token or account linking session expires → Alexa shows “device unresponsive” even though the device is online.
• Devices moved networks (router/mesh change, new SSID, DHCP/IP changes) → Alexa can’t reach them consistently.
• Groups/routines reference old “ghost” devices → routines fail, scenes don’t match reality.

We’ll fix this in the fastest order:
1) Confirm the Echo + phone are on the same account and stable Wi-Fi.
2) Force a clean device list refresh (discovery + remove ghosts).
3) Refresh the skill connection (disable/enable, relink account).
4) Repair Alexa groups and routines so they point to the correct devices.

Perfect — Wi-Fi changes are a top trigger for Alexa devices not syncing. Let’s do a clean baseline first (fast and safe).
Step 1 — Make sure Alexa can actually refresh
1) Put your phone on the same home Wi-Fi as the Echo devices (avoid VPN/guest Wi-Fi).
2) Update the Alexa app (App Store/Google Play) and restart the phone once (clears stale cache).
3) Power-cycle one Echo device (unplug 30 seconds, plug back in) so it re-registers on the new mesh network.

Step 2 — Run the right “Discover Devices” workflow
1) Alexa app → Devices → + → Add Device → pick the category/brand (or “Other”).
2) If your devices are skill-based (Kasa, Hue, SmartThings), discovery often depends on the skill connection, not just scanning Wi-Fi.
3) After discovery finishes, wait 60–90 seconds and refresh the Devices tab (duplicates can appear briefly during sync).

Yes — when a device is fine in the brand app but Alexa says “device is unresponsive”, the most common fix is refreshing the Alexa skill + removing “ghost” copies.
Step 3 — Refresh the skill connection (fastest sync reset)
1) Alexa app → More → Skills & Games → Your Skills → open the brand skill (Kasa, Philips Hue, etc.).
2) Tap Disable Skill. Wait 10–15 seconds.
3) Tap Enable again and sign in to relink the account (this refreshes the token/account linking).
4) Run Discover Devices once right after enabling the skill.

Step 4 — Remove duplicates the “clean” way
• In Alexa app → Devices → find the duplicate/ghost device → remove it (delete).
• Keep the one that updates state correctly (on/off status changes in real time).
• If you rename devices, do it in one place (either the brand app or Alexa) to avoid sync loops.

This usually fixes Alexa not syncing devices after Wi-Fi/mesh changes.

That’s a classic Alexa routines not working symptom: the routine points to old device IDs (ghosts) or a group contains duplicates.
Step 5 — Rebuild the group so Alexa syncs correctly
1) Alexa app → Devices → Groups → open the problem group.
2) Remove any device that appears twice or shows “unresponsive”. Save.
3) Add devices back only after they respond instantly in Alexa (toggle on/off from the device tile). Save again.

Step 6 — Fix the routine actions (quick refresh)
1) Alexa app → More → Routines → open “Good Night”.
2) Remove the old action that references the broken group/device.
3) Add the action again (pick the rebuilt group or the correct devices). Save.
4) Run the routine once from the app, then once by voice, and confirm the device states actually update.

This resolves “routine says done, but devices don’t change” — a common Alexa sync issue.

Yes — if different Echo devices “see” different device lists, it’s often Amazon account / household profile mismatch.
Step 7 — Confirm all Echo devices are on the same Amazon account
1) Alexa app → Devices → choose the Echo that’s missing devices → open settings (gear icon).
2) Check it’s registered to the same Amazon account as your Alexa app.
3) If you use Household, confirm you’re not switching profiles (voice profile/household can change what devices are accessible).
4) If one Echo is on a different account, re-register it to the correct account (fastest way to restore Alexa device sync).

Also make sure both Echos are on the same network (not guest Wi-Fi). Mesh systems sometimes put one speaker on an isolated SSID which breaks discovery and control.

Great progress. For Alexa sync issues involving lag, slow responses, or multi-room audio sync, it’s usually Wi-Fi quality and mesh roaming.
Step 8 — Quick mesh/Wi-Fi stability checklist (no “advanced” networking required)
• Put Echo devices on the main home network (not guest). Disable “client isolation/AP isolation” for that SSID.
• If your mesh offers separate 2.4/5 GHz SSIDs, you can keep one stable SSID for smart speakers and IoT (less roaming = better sync).
• Keep Echos away from microwave/Bluetooth-heavy spots; 2.4 GHz interference can cause dropouts and delays.
• If your router allows it, set reliable DNS (or use ISP DNS) and avoid “DNS filtering” features that can slow Alexa cloud calls.
• Rebuild the Multi-Room Music group (Devices → “+” → Combine Speakers / Multi-room music) after the network change so it syncs to the correct speaker IDs.

These tweaks reduce “laggy Alexa” and stabilize group playback.

If Alexa won’t sync after skill relink + cleanup, we do a “hard refresh” sequence that clears the last stubborn cache/ghost entries:
Step 9 — Last-resort sync reset (still safe)
1) Delete the stuck/ghost devices in Alexa (Devices → select → trash/delete).
2) Disable the related skill again, wait ~30 seconds, then enable and relink carefully (correct account).
3) Run discovery once, then wait 2 minutes before doing anything else (Alexa sometimes processes devices in waves).
4) If a specific Echo is acting weird, restart it; if it remains inconsistent, re-register it to the correct account.

If it’s still failing, it can be a brand-side cloud issue (skill outage) or incorrect region/locale mismatch for certain integrations. In that case, live chat helps because we can check exactly which skill, which account, and which devices are failing and fix the configuration quickly.

Summary: To fix Alexa sync issues, start by updating the Alexa app and restarting one Echo, then refresh the smart home connection by disabling/enabling the skill (relink account), delete duplicate/ghost devices, and rebuild Alexa groups and routines so they reference the correct devices. If different Echo devices see different device lists, confirm they’re registered to the same Amazon account/profile and on the same non-guest Wi-Fi. Still stuck? Open the chat and an expert will guide you step by step.