Thinking about this further the most likely explanation is this:
- Your router could not make contact with WMS on 172.18.1.10.
- I think if the router can't reach that IP it assumes gametime is active.
- As soon as contact is restored it will disable gametime.
Without knowing the IP of the router I can't verify. You also don't provide the day of the week this occurred.
On a Saturday gametime is active in the afternoon anyway. On a Friday gametime kicks in at 19h00 always.