Set an Incident Field on chat_launch page

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Good Day,

I am trying to set the value of a custom field (incident) based on the value that another custom field (contact) that is set by the customer on the chat_launch page. I want to use this field as an indicator in the toast pop-up for the chat.

Which I can not seem to get to work.  Further I put a rule in when an incident is created (first rule on initial stage) to set this incident custom field based on the contact custom field (rough/ugly test) and even though my Chat workspace is set to create the incident when the chat starts, it will not set the field until the chat is complete, even though the incident has the contact already assigned.