TTN is trying to downlink {} to my node

I am using ABP . After 12 uplink packets, TTN trys to downlink {} packet to my node.
Why did this happen?



It’s not really trying to send {}. Instead, TTN Console has no metadata to show, and shows {}.

I’d guess it’s sending ADR commands. The gateway’s Traffic page will show more details in the “trace” part of the downlink it created, displayed as, e.g. “link-adr”.

Thank indeed Arjan.
Yes, I forgot that I enabled ADR. So, my node hangs from time to time.
Now, for the time being, I disabled it.