We have a requirement where we have a rich text multiline to add request description and attached to a list column. Now, user can save the request and edit it to add more or change the description, if required and submit again.

I know that we can't have 2 controls "enabled" and "connected to same list column". 
Therefore, I tried using calculated control to fetch the value of my description, but calculated control can't be connected to Multiline control. 

Can someone help me in letting me know a workaround where we can keep both control enabled (one on new mode and another on edit mode) and still save it while submitting it first time (with formatting - hyperlinks, bold, etc.) and make it visible on second control for editing on edit mode?