Looks like lot of us are facing this same issue. I applied Visit visa for my parents as a group application of 2 on April 21'st evening EST and was surprised to receive the BIL for my mother within 5 hours, on 21'st night itself. But yet to receive the BIL for my dad who is the primary applicant.
This is putting us in a difficult situation as their plan is to go for Bio appointment together. BIL received states, that needs to be submitted within 30 days, so we only have time till May 22 to submit my mom's bio.
Based on the timing of responses received, I wonder if these BIL requests are send out by some automated scripts and it seem to somehow miss certain applicants. It's strange to receive the Bio request for a co applicant with a 30 day deadline and no request for the primary applicant.
Anyone know if they can waive off the bio request of one applicant for some reason ? Both of them haven't done bio ever in the past, buy they both have visited Canada about 12 years ago.