ESPHome on Intel NUC - All devices have connection issues

### The problem

I recently upgrade my HA install from a Raspberry Pi4b to an Intel NUC. I simply restored a snapshot from the Pi and everything was working fine. That is except for all my ESPHome devices. They are all disconnecting and reconnecting every second.

If I disconnect the NUC from the network and connect the Pi4 - Everything goes back to normal. All working fine.

I also have ESPHome desktop installed on docker for compiling (The Pi4b was struggling) When the NUC in on the network I can't compile.

Clearly its a NUC networking issue the relates to ESPHOme only. All other Integrations and add-on seem to be working fine.

Log info below:

### Which version of ESPHome has the issue?

2021.8.2

### What type of installation are you using?

Home Assistant Add-on

### Which version of Home Assistant has the issue?

core-2021.8.8

### What platform are you using?

ESP8266

### Board

All boards are D1-Mini

### Component causing the issue

All

### Example YAML snippet

```yaml
I don't think this is relevant.
```

### Anything in the logs that might be useful for us?

```txt
Example log from one device - The log is from my laptop docker install of ESPHome.

[09:19:42][D][api:067]: Disconnecting Home Assistant 2021.8.8 (10.0.0.13)
[09:19:42][D][api.connection:670]: Client 'Home Assistant 2021.8.8 (10.0.0.13)' connected successfully!
[09:19:47][D][api:067]: Disconnecting Home Assistant 2021.8.8 (10.0.0.13)
[09:19:47][D][api.connection:670]: Client 'Home Assistant 2021.8.8 (10.0.0.13)' connected successfully!

and after some time this happens...

[09:21:22][D][api:067]: Disconnecting Home Assistant 2021.8.8 (10.0.0.13)
[09:21:22][D][api.connection:670]: Client 'Home Assistant 2021.8.8 (10.0.0.13)' connected successfully!
WARNING Disconnected from API: Timeout while waiting for message response!
INFO Connecting to blinds01.local:6053 (10.0.0.30)
WARNING Couldn't connect to API (Error connecting to 10.0.0.30: [Errno 111] Connection refused). Trying to reconnect in 1 seconds
INFO Connecting to blinds01.local:6053 (10.0.0.30)
WARNING Couldn't connect to API (Error connecting to 10.0.0.30: [Errno 111] Connection refused). Trying to reconnect in 1 seconds
INFO Connecting to blinds01.local:6053 (10.0.0.30)
WARNING Couldn't connect to API (Error connecting to 10.0.0.30: [Errno 111] Connection refused). Trying to reconnect in 2 seconds

And logs from HA

Logger: homeassistant.components.esphome
Source: components/esphome/__init__.py:403
Integration: ESPHome (documentation, issues)
First occurred: 4:10:51 PM (286 occurrences)
Last logged: 7:19:56 PM

Can't connect to ESPHome API for light-sensor-02 (10.0.0.120): Error connecting to ('10.0.0.120', 6053): [Errno 111] Connect call failed ('10.0.0.120', 6053)
Can't connect to ESPHome API for light-sensor-02 (10.0.0.120): Timeout while waiting for API response!
Can't connect to ESPHome API for motion-entry (10.0.0.34): Timeout while waiting for API response!
Can't connect to ESPHome API for blinds01 (10.0.0.30): Timeout while waiting for API response!
Can't connect to ESPHome API for light-sensor-01 (10.0.0.117): Timeout while waiting for API response!
```

### Additional information

If anyone has some things in HA to look regarding the networking components that would be helpful.

Again if I reconnect the Pi4 to the network with exactly the same setup these issue go away. Its definitely this HA install on the NUC causing the issue.

Thanks in advance