Finally received GCMS response. Eligibility is in RR with comments indicating they are not able to verify Canadian experience duration (Employer details verified, pay stubs verified as mentioned in notes). File is untouched since January after the day when I paid my RPRF fees. And the surprising fact is my WP extension (with same UCI) has been approved in April

I guess I will have to send now again clarification with details of employment. I have sent experience letter, pay stubs, offer letter etc. Any guidance\help on sending such clarification will be helpful.