Hi David,
I had the same issue. Somehow I missed that experience letter should have roles & responsibilities. I dont have any GCMS notes but I realized about the mistake by reading this forum.
So I got revised experience letter with Role details from my employer. I sent it through CSE on 4th July, I called IRCC and they told its 5 days they will attach it to application and not 30 days. Not sure what is correct information as 5 vs 30 days.
But got confirmation today (15th July) that "they have received the document and We have forwarded it and the information you provided to the responsible office for their consideration."
I am hoping that if there is any issue with the document, they ask for it using ADR rather than rejecting the application itself
Keeping fingers crossed.
Also do they need salary slips as well? I didnt find any specific document requirement for it?