Noticed while checking why "group" no longer worked for me:
With stable:
/usr/bin/gpgconf --list-options gpg Monitor:1:0:Options controlling the diagnostic output:0:0:::: verbose:4:0:verbose:0:0::::1 quiet:0:0:be somewhat more quiet:0:0:::: Configuration:1:0:Options controlling the configuration:0:0:::: default-key:0:0:use NAME as default secret key:1:1:NAME:::"7093194AADBB8A2D14D3C9172978E9D40CBABA5C! encrypt-to:0:0:encrypt to user ID NAME as well:1:1:NAME:::"94A5C9A03C2FE5CA3B095D8E1FDF723CF462B6B1 group:4:1:set up email aliases:37:1:SPEC:::"gpg4win-intern@intevation.de=2E17923D761D9154B2C1A1763C43F4C8EFF5D42A,"gpg4win-intern@intevation.de=CE04B01EAF78330D567564A7A1E3864369A911FC,"gpg4win-intern@intevation.de=80615870F5BAD690333686D0F2AD85AC1E42B367,"testusers@example.com=EB4C5A5B7AD6C8527F050BAF1ED4F0BC6CFBC912,"testusers@example.com=1BB5F854B888A16320EF07DB68E787BE19D49845,"testusers@example.com=83862E2D687D04494E1253E38B1718010E51F6D3
With master:
gpgconf --list-options gpg Monitor:1:0:Options controlling the diagnostic output:0:0:::: verbose:4:0:verbose:0:0:::: quiet:0:0:be somewhat more quiet:0:0:::: no-greeting:0:3::0:0:::: debug-level:16:1::1:1::"none:: log-file:0:1:write server mode logs to FILE:32:1:FILE::: Configuration:1:0:Options controlling the configuration:0:0:::: default-key:0:0:use NAME as default secret key:1:1:NAME:::"94A5C9A03C2FE5CA3B095D8E1FDF723CF462B6B1 encrypt-to:0:0:encrypt to user ID NAME as well:1:1:NAME::: group:4:1:set up email aliases:37:1:SPEC::: compliance:16:2::1:1::"gnupg::
Note the difference in group and encrypt-to. Same GnuPG home directory. I use a gpg.conf-2 in my setup.