After a while, notifications stop arriving

[qwermus]

Thanks for the great app, it made it a lot easier to create my app.
But i have some questions. I use authorization, then listen for incoming calls. In this case, the console looks like this:

`[2020-07-24 09:03:26] PubNub.DEBUG: GET https://ps.pndsn.com/v2/subscribe/sub-c-b8b9cd8c-e906-11e2-b383-02ee2ddab7fe/265610645286545_6b66a04b/0?tt=15955780863943033&tr=2&pnsdk=PubNub-PHP%2F4.1.5&uuid=6E109BFA-671C-464F-8684-FFC47009EE78 {"method":"Subscribe"} []

[2020-07-24 09:04:06] PubNub.DEBUG: Response body: {"t":{"t":"15955780863943033","r":2},"m":[]} {"method":"Subscribe","statusCode":200} []

[2020-07-24 09:04:06] PubNub.DEBUG: GET https://ps.pndsn.com/v2/subscribe/sub-c-b8b9cd8c-e906-11e2-b383-02ee2ddab7fe/265610645286545_6b66a04b/0?tt=15955780863943033&tr=2&pnsdk=PubNub-PHP%2F4.1.5&uuid=6E109BFA-671C-464F-8684-FFC47009EE78 {"method":"Subscribe"} []

[2020-07-24 09:05:06] PubNub.ERROR: cURL error 28: Operation timed out after 60004 milliseconds with 0 bytes received {"method":"Subscribe"} []

[2020-07-24 09:05:06] PubNub.DEBUG: GET https://ps.pndsn.com/v2/subscribe/sub-c-b8b9cd8c-e906-11e2-b383-02ee2ddab7fe/265610645286545_6b66a04b/0?tt=15955780863943033&tr=2&pnsdk=PubNub-PHP%2F4.1.5&uuid=6E109BFA-671C-464F-8684-FFC47009EE78 {"method":"Subscribe"} []

[2020-07-24 09:06:06] PubNub.ERROR: cURL error 28: Operation timed out after 60004 milliseconds with 0 bytes received {"method":"Subscribe"} []

[2020-07-24 09:06:06] PubNub.DEBUG: GET https://ps.pndsn.com/v2/subscribe/sub-c-b8b9cd8c-e906-11e2-b383-02ee2ddab7fe/265610645286545_6b66a04b/0?tt=15955780863943033&tr=2&pnsdk=PubNub-PHP%2F4.1.5&uuid=6E109BFA-671C-464F-8684-FFC47009EE78 {"method":"Subscribe"} []

[2020-07-24 09:07:06] PubNub.ERROR: cURL error 28: Operation timed out after 60004 milliseconds with 0 bytes received {"method":"Subscribe"} []

[2020-07-24 09:07:06] PubNub.DEBUG: GET https://ps.pndsn.com/v2/subscribe/sub-c-b8b9cd8c-e906-11e2-b383-02ee2ddab7fe/265610645286545_6b66a04b/0?tt=15955780863943033&tr=2&pnsdk=PubNub-PHP%2F4.1.5&uuid=6E109BFA-671C-464F-8684-FFC47009EE78 {"method":"Subscribe"} []

[2020-07-24 09:08:06] PubNub.ERROR: cURL error 28: Operation timed out after 60001 milliseconds with 0 bytes received {"method":"Subscribe"} []

[2020-07-24 09:08:06] PubNub.DEBUG: GET https://ps.pndsn.com/v2/subscribe/sub-c-b8b9cd8c-e906-11e2-b383-02ee2ddab7fe/265610645286545_6b66a04b/0?tt=15955780863943033&tr=2&pnsdk=PubNub-PHP%2F4.1.5&uuid=6E109BFA-671C-464F-8684-FFC47009EE78 {"method":"Subscribe"} []

[2020-07-24 09:08:46] PubNub.DEBUG: Response body: {"t":{"t":"15955780863943033","r":2},"m":[]} {"method":"Subscribe","statusCode":200} []

[2020-07-24 09:08:46] PubNub.DEBUG: GET https://ps.pndsn.com/v2/subscribe/sub-c-b8b9cd8c-e906-11e2-b383-02ee2ddab7fe/265610645286545_6b66a04b/0?tt=15955780863943033&tr=2&pnsdk=PubNub-PHP%2F4.1.5&uuid=6E109BFA-671C-464F-8684-FFC47009EE78 {"method":"Subscribe"} []

[2020-07-24 09:09:46] PubNub.ERROR: cURL error 28: Operation timed out after 60004 milliseconds with 0 bytes received {"method":"Subscribe"} []

[2020-07-24 09:09:46] PubNub.DEBUG: GET https://ps.pndsn.com/v2/subscribe/sub-c-b8b9cd8c-e906-11e2-b383-02ee2ddab7fe/265610645286545_6b66a04b/0?tt=15955780863943033&tr=2&pnsdk=PubNub-PHP%2F4.1.5&uuid=6E109BFA-671C-464F-8684-FFC47009EE78 {"method":"Subscribe"} []
`

As you can see, every time a get an PubNub.ERROR: cURL error 28. Maybe, because, there are no calls? Tell me, is it correct?

And my second question is more of a problem. After i start the script ($ php index.php) i am successfully receiving notifications. First, the "Ringing" status, then, after the answer, the "CallConnected" status and at the end of the conversation "NoCall". Everything works successfully for 10-15 minutes, then notifications stop coming. Everything looks the same in the console, but there are no notifications. I need to press ctrl + z to stop the listener and then restart the $ php index.php script. After this, notifications come again, but after a while everything repeats again

What is the problem? How can I fix this?

Thank you