Routers Stuck with Port Lights On - Connectivity Restored after Reboot

The issue occurred because the router became stuck. The port lights were active, but there was no reachability. After rebooting, the router came back online and reachability was restored.

This router firmware is a stable version.
No high uptime was observed.

Model: CCR1009-7G-1C-1S+
Firmware Type: tilegx
Upgraded Firmware: 6.49.18

And the question is .... ?
The answer to non asked question is: It happens, observe if it reoccurs and then start to worry more.