Homebridge instance name in the config.json is different from the one appearing in the Home App
Hi all,
I have performed a fresh install of homebridge on ubuntu 20.04 LTS on rpi4. When I change the name of the homebridge in the config.json file, it is changed. However when I am searching it in the Home App the name is appended by 4 random letters and/or digits. Please refer to the config.json below.  

When I open the Home App and open the Add Accessory menu the name I see is "Homebridge pph home **43A1**". I cannot understand from where string **43A1** is added. Is this something normal?  

This behavior is exactly the same even in child bridges. As another example I have a child bridge with name = "eWeLink bridge" and what I see in the Home app is "eWeLink bridge **F789**" 

The related log entry is provided below: 

What I have tried so far is to delete cached accessories (and the persist folder), even try to understand from where bonjour service gets this name, with no luck. I also added a displayName: tag in the json file, but is not respected; I guess it does not exist although I get no errors by adding it. 

**To Reproduce:**
Simply change the name of your bridge. 

**Expected behavior:**
To see the same name in the Home app as per the config.json name: tag.

Any ideas? Thank you in advance! 

[**Logs:**]()
[2/24/2021, 8:59:05 PM] Loaded 0 cached accessories from cachedAccessories.
[2/24/2021, 8:59:05 PM] ---
[2/24/2021, 8:59:06 PM] Loaded plugin: homebridge-config-ui-x@4.39.0
[2/24/2021, 8:59:06 PM] Registering platform 'homebridge-config-ui-x.config'
[2/24/2021, 8:59:06 PM] ---
[2/24/2021, 8:59:06 PM] Loading 1 platforms...
[2/24/2021, 8:59:06 PM] [Config] Initializing config platform...
[2/24/2021, 8:59:06 PM] [Config] Running in Service Mode
Preparing Advertiser for 'Homebridge ppj home 43A1' using bonjour-hap backend!
Setup Payload:
X-HM://0024XUA88R8U8

```
Secondary Homebridge Logs here
```

**Homebridge Config:**

```json
{
    "bridge": {
        "name": "Homebridge ppj home",
        "username": "0E:B3:4A:18:A6:01",
        "port": 52666,
        "pin": "888-66-888",
        "advertiser": "bonjour-hap"
    },
    "accessories": [],
    "platforms": [
        {
            "name": "Config",
            "port": 8266,
            "auth": "form",
            "theme": "auto",
            "tempUnits": "c",
            "lang": "auto",
            "platform": "config"
        }
    ],
    "disabledPlugins": []
}
```

**Environment:**

Node.js Version v14.16.0
npm Version v6.14.11
user homebridge
Storage Path /var/lib/homebridge
Config Path /var/lib/homebridge/config.json
Service Mode Yes


* **Node.js Version**: v14.16.0
* **NPM Version**: v6.14.11
* **Homebridge Version**: 1.3.1
* **Operating System**: Ubuntu 20.04 on rpi4
* **Process Supervisor**: hb-service

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