Identity-signup function not being triggered when verification link used - 422

Support
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I am seing this on my end along side many others

  1. /api/* /.netlify/functions/:splat 200 this is not working for my site
  2. When I initiate a sign up, my web hooks do not get triggered
  3. when I try to invite someone to my site I see this
    `{“code”:422,“msg”:“Failed to handle signup webhook”}

I had changed my netlify default domain to a custom one yesterday. I am not sure if this issue is related to [Support Guide] Why do DNS / SSL changes take up to 48 hours to propagate?

I have been experiencing so many issues ever since I changed to a sub domain as a primary.