Missing libpq-dev version in buster-pgdg?

Hi folks,

Did something change recently with what versions of libpq-dev are published
to buster-pgdg? We have a dockerfile based on postgres:12.2 (which is
based on buster-slim) that installs "libpq-dev=$PG_MAJOR.*" and it just
recently (this week) started failing. running a brand new postgres
container and checking the apt cache, I only see versions for 11 (coming
from debian sources) and 13 (coming from buster-pgdg main). I have
verified that the sources list includes both main and 12 -- was it removed
from 12?

$ docker run --rm -it --entrypoint bash
postgres:12(dot)2root(at)fb7c949f82a0:/# apt update && apt-cache policy
libpq-devGet:1 http://deb.debian.org/debian buster InRelease [121 kB]
Get:2 http://security.debian.org/debian-security buster/updates
InRelease [65.4 kB]
Get:3 http://deb.debian.org/debian buster-updates InRelease [51.9 kB]
Get:4 http://apt.postgresql.org/pub/repos/apt buster-pgdg InRelease [103 kB]
Get:5 http://security.debian.org/debian-security buster/updates/main
amd64 Packages [233 kB]
Get:6 http://deb.debian.org/debian buster/main amd64 Packages [7,906 kB]
Get:7 http://deb.debian.org/debian buster-updates/main amd64 Packages [7,868 B]
Get:8 http://apt.postgresql.org/pub/repos/apt buster-pgdg/12 amd64
Packages [861 B]
Get:9 http://apt.postgresql.org/pub/repos/apt buster-pgdg/main amd64
Packages [203 kB]
Fetched 8,694 kB in 2s (3,782 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
19 packages can be upgraded. Run 'apt list --upgradable' to see them.
libpq-dev:
Installed: (none)
Candidate: 13.0-1.pgdg100+1
Version table:
13.0-1.pgdg100+1 500
500 http://apt.postgresql.org/pub/repos/apt buster-pgdg/main
amd64 Packages
11.9-0+deb10u1 500
500 http://deb.debian.org/debian buster/main amd64 Packages
11.7-0+deb10u1 500
500 http://security.debian.org/debian-security
buster/updates/main amd64 Packagesroot(at)fb7c949f82a0:/# cat
/etc/apt/sources.list.d/pgdg.listdeb
http://apt.postgresql.org/pub/repos/apt/ buster-pgdg main 12

Thanks,
Nick