My problem of getting medical request again even after the upfront medical exam got resolved after 29 days from the date of request. Following is the timeline:
Upfront Medical Exam: May 14, 2018
Upfront Submitted to IRCC: May 16
Study Permit Application Submitted: May 21
Medical Exam Requested Again: June 27 (after 36 days of application)
Medical Status Updated: July 26 (after 29 days of the request)
Visa Approved: August 02
So I sent two case specific inquiries and two emails, and all four times attached the e-medical sheet provided during the upfront medical exam.
First CSE to Delhi Visa Office: June 28
First Email to Delhi Visa Office: July 07
Second CSE to Delhi Visa Office: July 12
Second Email to Delhi Visa Office: July 25
I was told by the physician at the clinic that all is well as he inquired about my medical report. But only after 29 days it got updated. Worth waiting, but I was concerned. Be patient. In the end, it feels nice. Good luck!