Changing keyboard layout doesn't work during installation

[schollsky]

This issue goes to non-English/US keyboard/language users: During installation I chose German keymap, but English was used instead. I was installing inside VirtualBox. Installed system uses correct settings though.

$ lsb_release -rd
Description: Ubuntu Groovy Gorilla (development branch)
Release: 20.10

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu37
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Jun 5 20:30:21 2020
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
InstallationDate: Installed on 2020-06-04 (0 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200603)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)