Getting a HELOC on a Sub2

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Gooood morning Biggerpockets! 

I currently have several properties obtained "subject to", and am currently exploring options to utilize their equity to fund other non-RE projects.

While my POA on the trust allows for it, would obtaining a HELOC on a "subject to" property trigger the Due on Sale Clause? Or send up red flags that would catch the lender's attention.

How much communication/involvement is there between a bank and a lender when a HELOC is associated with a property?

Lloyd Stanton.
American.