A classC device is stuck at collision_beacon TTN console answer for every downlink command.
I wonder if downlink message number has been exceeded and must wait some time longer than 8h. I feel I have tried everything else but delete and register device again.
Something tells me there is a downlink message hold somewhere colliding with any new message.
This has been working nicely (8-12 downlink messages/day) for 2 years.