iPad hub disconnecting 
**Describe The Bug:**
iPad is the home hub and disconnecting sometimes

my iPad is the home hub , and it sometimes disconnect from all the HB devices (HomeKit devices work fine).
if I open the home app in the iPhone I see all the devices up and running.
after I shut down Wifi on the iPad and reopen in start working again.
I use Tp-Link router.

**To Reproduce:**
Turn off and reopen wifi on the iPad

**Expected behavior:**
nothing showed on the log

**Screenshots:**

**Environment:**

* **Node.js Version**: v15.3.0
* **NPM Version**: v7.0.14
* **Homebridge Version**: v1.2.3
* **Operating System**: Raspbian 
* **Process Supervisor**:  hb-service 

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