Action Cable not working in Safari on IOS - ios

Question

I want to exchange information about action cable in rails 6.0.2.
On my desktop this also works great.
But unfortunately in Safari on my IPhone and IPad (IOS 13.4) the connection to the websocket is not established. Neither the 'connected' nor the 'received' function is called. I have no errors or infos in the Developer Tools console of Safari on my IPhone (connected via cable).
I have all relevant files here again, they are mostly standard generated by rails.
app/javascript/channels/test_channel.js
import consumer from "./consumer"
consumer.subscriptions.create("TestChannel", {
connected() {
console.log("connected")
},
disconnected() {
console.log("disconnected")
},
received(data) {
console.log("received")
}
});
app/javascript/channels/consumer.js
import { createConsumer } from "#rails/actioncable"
export default createConsumer()
app/javascript/channels/index.js
const channels = require.context('.', true, /_channel\.js$/)
channels.keys().forEach(channels)
app/javascript/channels/index.js
const channels = require.context('.', true, /_channel\.js$/)
channels.keys().forEach(channels)
app/javascript/packs/application.js
require("#rails/ujs").start()
require("turbolinks").start()
require("#rails/activestorage").start()
require("channels")
package.json
{
"name": "...",
"private": true,
"dependencies": {
"#rails/actioncable": "^6.0.0",
"#rails/activestorage": "^6.0.0",
"#rails/ujs": "^6.0.0",
"#rails/webpacker": "4.2.2",
"turbolinks": "^5.2.0"
},
"version": "0.1.0",
"devDependencies": {
"webpack-dev-server": "^3.10.3"
}
}
app/channels/test_channel.rb
class TestChannel < ApplicationCable::Channel
def subscribed
stream_from "some_channel"
end
def unsubscribed
# Any cleanup needed when channel is unsubscribed
end
end
ngnix Config (It does not work locally in development either)
....
location /cable {
passenger_app_group_name test_app_action_cable;
passenger_force_max_concurrent_requests_per_process 0;
}

Answer 1

Ok, it was my mistake. In my Safari the experimental features 'NSURLSession WebSocket' was enabled. After I disabled the option, it worked. The option can be found at:
Launch Settings > Scroll down to find Safari, and tap it. > Scroll down to click the Advance option. Then you will see the Experimental Features > Tap it