When trying to just modify one field in a document that has not been signed, all the 100 fields in the documents are erased when selecting modify document action. This action should not erase all the data already on the form but allow the sender who initiated the form to go in the document and update any applicable field that needs to be updated before anyone signs the document. Having to complete an entire document again defeats the purpose of modifying a document. Why not then just cancel the document and resubmit it. This is basically what the Modifying document action is doing.