Same here, I encourage everyone to contact their MP and raise this issue with IRCC.Hi there, yours is simillar than mine.
2016. 11. 28 cic received
2017. 02. 05 AOR
2017. 03. 16 Pay for RPRF
2017. 04. 04 reminder mail
2017. 05. 16 Upfront medical exam
2017. 05. 19 Background check changed: "Not applicable"
2017. 06. 26 Passed the medical exam
And now, nothing change.