Periodic Unavailability of Amazon Echo Devices

Hey Community!

I’ve been struggling with this Issue for 2 days now, ive revamped everything from nginx, to unbound dns and i cannot figure out what is wrong.

I added my 2 Echo Dots using the Devices & Services > Alexa Devices.

They appear and i can play sound and it works fine. But peridodically and also when trying to update the DND Status, i get following error in my log:

This is when it works for 30 seconds

e[36m2025-10-20 06:23:41.835 DEBUG (MainThread) [aioamazondevices] Logging-in for r******@g****.com with stored datae[0m
e[36m2025-10-20 06:23:41.835 DEBUG (MainThread) [aioamazondevices] GET request: https://alexa.amazon.de/api/bootstrap?version=0 with payload None [json=False]e[0m
e[36m2025-10-20 06:23:41.835 DEBUG (MainThread) [aioamazondevices] Adding to headers: {'csrf': '-1944893572'}e[0m
e[36m2025-10-20 06:23:42.170 DEBUG (MainThread) [aioamazondevices] Response for url https://alexa.amazon.de/api/bootstrap?version=0 :
status      : 200                                   
content type: application/json e[0m

And this is where it stops working.

e[36m2025-10-20 06:24:11.833 DEBUG (MainThread) [aioamazondevices] Logging-in for r******@g****.com with stored datae[0m
e[36m2025-10-20 06:24:11.833 DEBUG (MainThread) [aioamazondevices] GET request: https://alexa.amazon.de/api/bootstrap?version=0 with payload None [json=False]e[0m
e[36m2025-10-20 06:24:11.833 DEBUG (MainThread) [aioamazondevices] Adding to headers: {'csrf': '-1944893572'}e[0m
e[36m2025-10-20 06:24:11.898 DEBUG (MainThread) [aioamazondevices] Response for url https://alexa.amazon.de/api/bootstrap?version=0 :
status      : 400                                   
content type: application/json e[0m
e[31m2025-10-20 06:24:11.898 ERROR (MainThread) [homeassistant.components.alexa_devices] Error fetching [email protected] data: Error retrieving data: CannotRetrieveData('Request failed: Bad Request')e[0m
e[36m2025-10-20 06:24:11.899 DEBUG (MainThread) [homeassistant.components.alexa_devices] Finished fetching [email protected] data in 0.066 seconds (success: False)e[0m
e[36m2025-10-20 06:24:11.899 DEBUG (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: entity_id=binary_sensor.bad_echo_connectivity, old_state=<state binary_sensor.bad_echo_connectivity=on; device_class=connectivity, friendly_name=Bad Echo Connectivity @ 2025-10-20T06:23:12.267977+02:00>, new_state=<state binary_sensor.bad_echo_connectivity=unavailable; device_class=connectivity, friendly_name=Bad Echo Connectivity @ 2025-10-20T06:24:11.899239+02:00>>e[0m

This causes the Log to look like this:

Ive also added my latest log fully, please, any crumb of help would be appreciated, as i cannot figure out, why amazon is periodically calling my requests bad but other times not.

There seems to be a Github issue about this: