So, in our case the solution was to disable 802.1X and built-in RADIUS-server on Omada SDN. After being done, there were no switch hang-ups. Hope this helps someone!

@Ethan-TP When the issue occurs, the switch becomes unavailable. - I wrote before. So, it's impossible to manage via Omada SDN, no opportunity to export Device-Info. Also, no opportunity to access...

We are facing the same problem as mentioned in this thread: Access to management is lost - Business Community

@Ethan-TP Thank you for answering. All LEDs are flashing. I tried to run "show dump info", but there is no such command.

Hi. There are SG3452XP switches (about 20 devices), adopted by Omada SDN (version 5.15.24.19). Sometimes one can become unavailable for management - status in Omada becomes "disconnected" and it's...