In Homekit: My accessory isn't shown here
Following a migration from a raspberry instance of Homebridge to a Synology Docker container all works fine, communication with the TV, all buttons work in the browser - I'm just unable to add the accessory in Homekit, it just doesn't show up.

The `homebridge.log` shows this:
```
[1/11/2021, 8:17:14 PM] [webostv] Initializing webostv platform...
[1/11/2021, 8:17:14 PM] [webostv] Init - initializing devices
[1/11/2021, 8:17:14 PM] [webostv] [Monitor] Init - got TV configuration, initializing device with name: Monitor
[1/11/2021, 8:17:14 PM] Monitor 459F is running on port 52178.
[1/11/2021, 8:17:14 PM] Please add [Monitor 459F] manually in Home app. Setup Code: 031-45-154

[1/11/2021, 10:36:11 PM] [webostv] [Monitor] Connected to TV
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] Got TV information
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] TV webOS version: 4.0
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] TV turned on!
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] App launched, current appId: com.webos.app.hdmi1
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] Sound output changed. Current sound output: tv_external_speaker
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] Subscribed to TV services
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] Connected to remote pointer input socket
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] Setup finished
[1/11/2021, 10:36:11 PM] [webostv] [Monitor] TV setup finished, ready to control tv
```
looks all fine, right?

In the moment the old instance on the pi is revived, the accessory is visible in the `Add Accessory` flow, add-able, and working.

So, how to convince the new instance to present itself to Homekit?
How to check it's presence independently from Homekit?

Help is appreciated!