Same problem here. After every power outage, the IOT box ends up in a Bad gateway error. (And I must reflash the SD card.)
The same problem was on iotbox version 24 and also the current latest 25. 

I am quite disappointed, that the system cannot handle a trivial thing like a hard power reset. 

Hello,

I invite you to open a support ticket on the matter at odoo.com/help we will lead a deeper analysis as this is an unexpected behavior.

There is many different reasons which could cause this, but, generally, it is because odoo process running on the IoT crashed, did not started or is updating. An example of a common crash is after an odoo database upgrade as then the IoT code version might mismatch with the installed IoT one.

You can connect in SSH to your IoT box following this guide:
https://lse-odoo.github.io/iot/technical/ssh.html#ssh-iot
But note that you will need to have the IoT accessible to generate the IoT password and that it changes at each reboot (or IoT odoo service restarted)

Same problem here, still no solution?

Appears to be only concerning the IOT boxes running image version 23.11, all the other running 23.09 are working fine.

Hello, we have the same problem here. I'm reopening the subject for a possible solution ..?!