My TTIG is still listed as online.
My Raspberry Pi + RAK831 however is listed as “Last seen 7 days ago”.
Sometimes (once every few months - that’s at least when I notice it) the Pi based gateway is listed in TTN console as not online.
I thought this was caused by a hickup of the gateway and when I detect it, I just reboot it (without actually checking if it is truly offline or that TTN console just reports an incorrect status).
The reboot usually makes it listed as online again.
So today when I noticed “Last seen 7 days ago” I just rebooted the Pi gateway.
After reboot the TTN console still shows “Last seen 7 days ago”.
But in the Application Data tab I just see messages coming in and the Pi gateway listed as “Last seen 7 days ago” is listed as one of the gateways that received the message. So while it is listed as offline it is just working.