I have a Raspberry Pi running Ubuntu Linux that runs a local web server. Until recently I have been able to connect to the server without issues. In the last week, however, when I try to connect from my laptop I am unable to see the device.

I can fix this by connecting to the Pi via SSH from another device and pinging my laptop's IP address. As soon as I do this, I am able to see the Pi from the laptop.

Is this a known issue with the Deco S4 and is it fixable?