I'm having an issue with the web calls system. Basically whenever i have a call with vapi on the browser (on my iphone), it cuts the first ~1 second of the conversation. I am unable to recreate this on a desktop, but recreated it on several iphones. It's consistently a problem on iphones. You can recreate this issue by going to vapi.ai (your landing page) and trying the ai there. It's broken in your landing page for any iphone i've tried.