I can vouch for this.Applicants who's Comprehensive SS was initiated in the month of Feb 2019 have started getting remedial requests. I am yet to see one for myself (25th Feb SS initiated) - hopefully soon.
I don't know when my SS started , but on 17th July I was asked for
1. PCC of home country again
2. Schedule A background / Declaration
3. Re-medical
Everything submitted.
Medical passed again on 23rd July
ADR says Not Applicable 1 working day after upload..
Fingers crossed