Homebridge Config Page Stops Responding After ~1.5 Days
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**Describe The Bug:**
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From a fresh restart, the Homebridge UI (homebridge-config-ui-x, I imagine) at https://homebride.local stops responding and I get a "Server Not Found" error in my browser. The devices connected to HomeKit via Homebridge **are not impacted** and still seem to work fine, but I cannot reach the config page and need to force restart my Raspberry Pi. However, if I go to the IP address of the Pi, the config UI loads fine.

Connecting to the Pi via ssh (`ssh pi@homebridge.local`) also times out; connecting via ssh to the IP address works fine.

**To Reproduce:**
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- Boot Homebridge
- Wait a day or so

(Sorry this is so basic, but this is essentially what happens)

**Expected behavior:**
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homebridge.local should stay up

[**Logs:**]()
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<!-- Please include the beginning of the log where the homebridge initialization happens -->
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The logs don't show anything happening on the DNS level, but I can post them if needed.

```
Secondary Homebridge Logs here
```

**Homebridge Config:**
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```json
Show your homebridge config.json here
```

**Screenshots:**
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**Environment:**

* **Node.js Version**: <!-- node -v --> v12.18.3
* **NPM Version**: <!-- npm -v -->6.14.8
* **Homebridge Version**: <!-- homebridge -V --> 1.3.5
* **Operating System**: Raspbian
* **Process Supervisor**: hb-service

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