Homebridge accessories going No response when leaving my wifi network
### Current Situation

Hi, I am a total noob, non-technical, do not work in IT, just like to play with Homekit. Installed HB two days back and was able to successfully install some plugins. Everything perfectly works until the moment I leave my home (better said my iPhone leaves the home wifi network). Immediatelly all the HB accessories (Roborock, Samsung TV, some dummy switches) shows "No response". I have no clue where the problem could be rooted. Did some research but cannot resolve the problem :-(. Could anyone smarter than me suggest where to look for a solution? 
Running HB on Rasp Pie 4 (4GB), wired connection, Linksys Velop mesh router, Apple TV as a HK hub, iPhone already upgraded to IOS16. 
Would be really grateful for any help. Many thanks in advance! 

### Logs

```markdown
not sure what to put in :-(
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### Configuration

```json
not sure what to put in :-(
```


### Environment

Raspbian GNU/Linux Bullseye (11)
HB 1.5.0.
Node: 16.16.0


### Process Supervisor

hb-service

### Additional Context

_No response_