If the ownership is the same, it would be a refinance.
Commercial and consumer are departments within a bank. "Purpose" is generally what triggers consumer regulations - not where the bank originates a loan from.
There should be some concern that the property was changed from owner occupied to rental without triggering a condition in the note/mortgage, especially if there was a change without notification of the lender. In many cases when that happens, the loan is callable.
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Integrity. With it, nothing else matters. Without it, nothing else matters.