Missing assistant-request webhook

I’ve configured a Server URL in Vapi to send events to my n8n webhook/workflow. This had been working, but for the past few days no assistant-request messages are being sent to the webhook anymore.

What could be causing this? Could it be related to Twilio? I purchased a second Twilio number for my voice agent because call forwarding didn’t work on the previous number; with the new number, forwarding works.

Thanks for your help.
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