macOS – Show Network Name Next to WiFi Icon

The first step is to know why the connection is failing, so you might need to look in the console log for messages that speak to en1 / link down / AirPort and such. I don't see a good troubleshooting article from Apple to start things out, but feel free to comment here or edit the answer yourself as we narrow down the when and then finally the why.

It's a personal hotspot created by an iOS device to share the cellular data connection that the phone has over Wi-Fi.