i guess IRCC agents are just guessing at this point because this is all new to them.This is not true. I have an extensive list of jobs
The largest file I uploaded was 3800kb and smallest 2000kb.
I don't really think it has much to do with the file size tho.
my friend tried many times with no success and even called IRCC and every time she would get a different answer/suggestion,she even filled the forms with capital letters but nothing works.