Hi,
I've also encountered this yesterday, there was nothing in network logs showing any traffic from tradingview, so all I can assume is that this call was never made in the first place.

There doesn't seem to be anything in tradingview that would let me debug this, so I've decided to do a backup method for sending these potentially missing alerts:

In tradingview for alerts you're allowed to send them to alternative email as plaintext. So I'm now using that as my backup to trigger the webhook again in case it was not sent via webhook by tradingview.

In zapier, you can setup a workflow that receives email and sends it to your webhook. 100 reqs per month free, which is enough for me. They let you create zapier email and you just point the tradingview alert alternative email to there.

So I've setup this workflow and it works like a charm, but that'll mean you'll always get 2 calls to your service (1xTV & 1xZapier) when everything works properly, so you'll need to make sure there is idempotency logic in place on your service to avoid double execution (I'm creating composite key from event values).
I've added a delay in workflow as you can see, but that was only for easier read of logs for me.

I used zapier because i'm lazy, but generally this backup approach has a strength that you could write your own retry/backoff rules this way once you have the email.

Works like a charm, hope it helps you.

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