Seems to me you’re using ABP, and are sending about every minute, and then restarted the node at 16:51? It then took 56 minutes to re-use counter values 0 through 56, which TTN already handled, so ignored. Somehow 57 was lost, so 58 was the first that was accepted. See the documentation and ABP node stopped working -> Fixed by creating new ABP.. Why? :) - #7 by arjanvanb