Fire TV Stick 4k + Echo 4 connection problem


I have the Echo 4 connected to my Fire TV.
I've set up both using the Combined Speakers > Home Theater option, but they often stop working, it starts working and I can listen to content, but after a few seconds they disconnect. Does anyone know how to fix it?


Try to delete the already created Home Theater setup first.
Select it under "Devices", then tap "Unpair". Then, create it again through the Alexa App.
Echo 4
For the audio sync, after you've repaired the Echo to your Fire TV Stick 4K, try using the AV Sync Slider:
  1. Go to Settings on your Fire TV Stick 4K.​
  2. Select Display and Sounds.​
  3. Select Audio.​
  4. Select AV Sync Tuning.​
  5. When audio and video are in sync, every bounce of the on-screen ball happens at the same time as a flash and a click tone.​
  6. Make adjustments:
    1. Use the right and left buttons on your Fire TV remote. Move to the right if the click tone happens before the flash. Move to the left if the click tone happens after the flash.​
    2. Press the Select button on your remote to apply the changes.​
    3. Check if the ball, click tone, and flash sync up, and make adjustments as needed.​