The HOMEPAGE does not announce intermittent minor releases that fix important issues in major releases. Currently, that's 19.3.6.7 whereas we distribute 19.3 and 20.3 whereas we distribute 20.3.2. See also a relatively recent discussion on a relevant mailing list: http://erlang.org/pipermail/erlang-questions/2017-December/094496.html (with follow-ups well into January)
This is not a regression over current stable
Anyway, this is maintainer-needed, then, anyone can make the switch whenever they have time and, of course, we can stabilize that version to finally solve it
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=76340e6f028622381968af8a81e0b6d7bce2e963