Translators can save their works mid-progress, but they cannot submit or deliver their ongoing works of 1:1 Pro services.
Even if translators saved their works mid-progress, requesters can only check the translation progress (10-90%), not the content.
Therefore, translators must upload the finished version of the translation when making their final submissions.
Because ongoing works cannot be submitted, translators/proofreaders should actively communicate with the requesters on their questions.
Since sharing personal contact information is prohibited, the chat service is vital for communication between the translator or proofreader and the requester. Please take advantage of this service.