So I got my COPR and visa stamped today.Recently couple of people told that they got letter before PPR email asking them if they can travel before their medical expiry (Which was coming soon). If they are not able to travel, then they would issue a re-medical letter first.
So most likely in your case, your medicals might get extended.
Current medical expiry is Dec 2019, neither I got remedical request nor I did remedical, still COPR and visa expiry is Oct 2020.
Complete timeline is
ITA 12 Dec 2018
AOR 04 Feb 2019
Medical passed 19 Mar 2019
Bio done 04 Apr 2019
Ghost update 07 Oct 2019
PPR 16 Oct 2019
Passport submitted 20 Oct 2019
COPR and Visa 24 Oct 2019
London VO
All the best to everyone....