Error in log when using local notifications with mobile_app using the 2021.7 iOS beta app

[rccoleman]

The problem

Using the new local notification feature of the 2021.7 beta version of the iOS app, I get the following error in the log when joining my local Wifi network and the iOS app refreshes:

2021-06-20 12:05:45 ERROR (MainThread) [homeassistant.components.websocket_api.http.connection] [139965000796624] Error handling message: Unknown error
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/connection.py", line 100, in async_handle
    handler(self.hass, self, schema(msg))
  File "/usr/src/homeassistant/homeassistant/components/mobile_app/__init__.py", line 163, in handle_push_notification_channel
    registered_channels.pop(webhook_id)()
TypeError: forward_push_notification() missing 1 required positional argument: 'data'

Seems to be related to #50750, and specifically this:

registered_channels.pop(webhook_id)()

this:

registered_channels[webhook_id] = forward_push_notification

and this:

def forward_push_notification(data):

What is version of Home Assistant Core has the issue?

core-2021.6.5

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

mobile_app

Link to integration documentation on our website

https://www.home-assistant.io/integrations/mobile_app/

Example YAML snippet

No response

Anything in the logs that might be useful for us?

As above:


2021-06-20 12:05:45 ERROR (MainThread) [homeassistant.components.websocket_api.http.connection] [139965000796624] Error handling message: Unknown error
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/connection.py", line 100, in async_handle
    handler(self.hass, self, schema(msg))
  File "/usr/src/homeassistant/homeassistant/components/mobile_app/__init__.py", line 163, in handle_push_notification_channel
    registered_channels.pop(webhook_id)()
TypeError: forward_push_notification() missing 1 required positional argument: 'data'

Happens when switching to the local wifi network from the cellular network on my iPhone when using the just-released 2021.7 beta of the iOS app.

### Additional information

_No response_

[probot-home-assistant]

mobile_app documentation
mobile_app source
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[probot-home-assistant]

Hey there @robbiet480, mind taking a look at this issue as its been labeled with an integration (mobile_app) you are listed as a codeowner for? Thanks!
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