conan: [bug] conan test fails when using lockfiles

The test_package tests fail for both conan create or conan test commands when using lockfiles.

Environment Details (include every applicable attribute)

• Conan version: 1.46.0
• Python version: 3.7.9

Steps to reproduce (Include if Applicable)

conan lock create conanfile.py --profile:host default --profile:build default --lockfile-out locks/conan.lock
conan create conanfile.py --lockfile locks/conan.lock

Logs (Executed commands with output) (Include/Attach if Applicable)

<install and build succeeds>
...
Executing test_package liba/0.1
Configuration (profile_host):
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=7
os=Linux
os_build=Linux
[options]
[build_requires]
[env]

Configuration (profile_build):
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=7
os=Linux
os_build=Linux
[options]
[build_requires]
[env]

ERROR: Something failed while testing 'liba/0.1' test_package after it was built using the lockfile. Please report this error: 'liba'
Error: Process completed with exit code 1.

More detailed log from cd test_package && conan test . liba/0.1 --lockfile=../locks/conan.lock (also tried with reference liba/0.1@_/_):

Using lockfile: 'C:\Projects\conan-demo\conan-demo-liba\conan.lock'
Configuration (profile_host):
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=7
os=Linux
os_build=Linux
[options]
[build_requires]
[env]

Configuration (profile_build):
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=7
os=Linux
os_build=Linux
[options]
[build_requires]
[env]

Traceback (most recent call last):
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\command.py", line 2238, in run
    method(args[0][1:])
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\command.py", line 311, in test
    lockfile=args.lockfile, profile_build=profile_build)
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\conan_api.py", line 93, in wrapper
    return f(api, *args, **kwargs)
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\conan_api.py", line 334, in test
    test_build_folder=test_build_folder, recorder=recorder)
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\cmd\test.py", line 51, in install_build_and_test
    test=True  # To keep legacy test_package_layout
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\manager.py", line 62, in deps_install
    require_overrides=require_overrides)
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\graph\graph_manager.py", line 124, in load_graph
    require_overrides)
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\graph\graph_manager.py", line 164, in _load_root_node
    require_overrides)
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\client\graph\graph_manager.py", line 281, in _load_root_test_package
    graph_lock.find_require_and_lock(create_reference, conanfile)
  File "c:\users\gjess\appdata\local\programs\python\python37\lib\site-packages\conans\model\graph_lock.py", line 664, in find_require_and_lock
    conanfile.requires[reference.name].lock(locked_ref, node_id)
KeyError: 'liba'

ERROR: 'liba'