Doorbell button no longer triggers
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**Describe The Problem:**
Doorbell button no longer triggers Doorbell switch. Other functions continue to work. Nothing was touched in the config from the day when things were working to the day that things suddenly stopped working.

**To Reproduce:**
Ring doorbell. Nothing happens in Homebridge. All other Homebridge / Homebridge-Unifi plugin features continue to work (e.g. visibility of camera streams in Homekit, motion detection triggers, etc.)

**Logs:**
Nothing appears in the logs when the button is pressed.

```
[25/01/2021, 13:57:11] [HB Supervisor] OS: Linux 5.4.51-v7+ arm
[25/01/2021, 13:57:11] [HB Supervisor] Node.js v14.15.3 /usr/local/bin/node
[25/01/2021, 13:57:11] [HB Supervisor] Homebridge Path: /usr/local/lib/node_modules/homebridge/bin/homebridge
[25/01/2021, 13:57:11] [HB Supervisor] UI Path: /usr/local/lib/node_modules/homebridge-config-ui-x/dist/bin/standalone.js
[25/01/2021, 13:57:11] [HB Supervisor] Starting Homebridge with extra flags: -I
[25/01/2021, 13:57:11] [HB Supervisor] Started Homebridge v1.1.7 with PID: 686
[25/01/2021, 13:57:14] Loaded config.json with 1 accessories and 4 platforms.
[25/01/2021, 13:57:14] ---
[25/01/2021, 13:57:18] Loaded plugin: homebridge-camera-ffmpeg@3.0.3
[25/01/2021, 13:57:18] Registering platform 'homebridge-camera-ffmpeg.Camera-ffmpeg'
[25/01/2021, 13:57:18] ---
[25/01/2021, 13:57:18] Loaded plugin: homebridge-config-ui-x@4.36.0
[25/01/2021, 13:57:18] Registering platform 'homebridge-config-ui-x.config'
[25/01/2021, 13:57:18] ---
[25/01/2021, 13:57:18] Loaded plugin: homebridge-nuvo@2.2.0
[25/01/2021, 13:57:18] Registering platform 'homebridge-nuvo.nuvo-platform'
[25/01/2021, 13:57:18] ---
[25/01/2021, 13:57:18] Loaded plugin: homebridge-script2@0.3.0
[25/01/2021, 13:57:18] Registering accessory 'homebridge-script2.Script2'
[25/01/2021, 13:57:18] ---
[25/01/2021, 13:57:18] Loaded plugin: homebridge-telegram@0.2.0
[25/01/2021, 13:57:18] Registering platform 'homebridge-telegram.Telegram'
[25/01/2021, 13:57:18] ---
[25/01/2021, 13:57:19] Loaded plugin: homebridge-unifi-protect@4.3.5
[25/01/2021, 13:57:19] Registering platform 'homebridge-unifi-protect.UniFi Protect'
[25/01/2021, 13:57:19] ---
[25/01/2021, 13:57:19] Loading 4 platforms...
[25/01/2021, 13:57:19] [Config] Initializing config platform...
[25/01/2021, 13:57:19] [Config] Running in Service Mode
[25/01/2021, 13:57:19] [UniFi Protect] Initializing UniFi Protect platform...
[25/01/2021, 13:57:19] [Telegram] Initializing Telegram platform...
[25/01/2021, 13:57:19] [Telegram] TelegramPlatform Plugin Loaded
[25/01/2021, 13:57:19] [Telegram] Found bot in config: "Telegram Bot"
[25/01/2021, 13:57:20] Initializing platform accessory 'Telegram Bot'...
[25/01/2021, 13:57:20] [Camera FFmpeg] Initializing Camera-ffmpeg platform...
[25/01/2021, 13:57:20] Loading 1 accessories...
[25/01/2021, 13:57:20] [Telegram Script] Initializing Script2 accessory...
[25/01/2021, 13:57:20] [Camera FFmpeg] [Hikvision] Configuring cached bridged accessory...
[25/01/2021, 13:57:35] [Homebridge UI] Homebridge Config UI X v4.36.0 is listening on :: port 8581
Setup Payload:
X-HM://0000XXX0XX0X0
Enter this code with your HomeKit app on your iOS device to pair with Homebridge:
                       
    ┌────────────┐     
    │ 000-11-000 │     
    └────────────┘     
                       
[25/01/2021, 13:57:20] Homebridge is running on port 51345.
[25/01/2021, 13:57:33] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Connected to the Protect controller API (address: 192.168.11.15 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Connected to the UniFi realtime update events API.
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: Us [UVC G3 Dome] (address: 192.168.11.120 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: Doorbell [UVC G4 Doorbell] (address: 192.168.11.57 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: HSN [UVC G3] (address: 192.168.11.123 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: APS [UVC G4 Pro] (address: 192.168.11.173 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: APN [UVC G4 Pro] (address: 192.168.11.56 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: Dwn [UVC G3 Dome] (address: 192.168.11.127 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: Kit [UVC G3 Dome] (address: 192.168.11.130 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: Gt [UVC G3 Dome] (address: 192.168.11.134 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: Dy [UVC G3 Dome] (address: 192.168.11.128 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: Ge [UVC G3 Flex] (address: 192.168.11.133 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Discovered camera: Rk [UVC G3 Dome] (address: 192.168.11.129 mac: 18E000000000).
[25/01/2021, 13:57:34] [UniFi Protect] Ultimo [UCK-G2-PLUS]: Controller refresh interval set to 10 seconds.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Us [UVC G3 Dome]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Doorbell [UVC G4 Doorbell]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] HSN [UVC G3]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] APS [UVC G4 Pro]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] APN [UVC G4 Pro]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Dwn [UVC G3 Dome]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Kit [UVC G3 Dome]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Gt [UVC G3 Dome]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Dy [UVC G3 Dome]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Ge [UVC G3 Flex]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Rk [UVC G3 Dome]: Enabling doorbell automation trigger.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Doorbell [UVC G4 Doorbell]: Discovered doorbell message switch: LEAVE PACKAGE.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Doorbell [UVC G4 Doorbell]: Discovered doorbell message switch: DO NOT DISTURB.
[25/01/2021, 13:57:35] [UniFi Protect] Ultimo [UCK-G2-PLUS] Doorbell [UVC G4 Doorbell]: Discovered doorbell message switch (60 seconds): Call 11111111.
[
```

**Homebridge Configuration:**

```json
        {
            "controllers": [
                {
                    "address": "192.168.11.15",
                    "doorbellMessages": [
                        {
                            "duration": 60,
                            "message": "Call 11111111"
                        }
                    ],
                    "password": "xxxxxxxx",
                    "username": "homebridge"
                }
            ],
            "options": [
                "Enable.Doorbell.Trigger"
            ],
            "verboseFfmpeg": false,
            "platform": "UniFi Protect"
        },
```

**Screenshots:**
None

**Environment:**

* **Homebridge Version:** 1.1.7
* **Node Version:** v14.15.3 
* **Homebridge-UniFi-Protect Plugin Version:** homebridge-unifi-protect v4.3.5 
* **UniFi Protect Version:** 1.17.1
* **UniFi Protect Controller Type:** UCKgen2+
* **UniFi Protect Controller Firmware Version:** 2.0.24
* **Operating System and OS Version:** Raspbian GNU/Linux Buster (10)

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