vcvarsall.bat during tools\setup-buildtools.cmd execution unsets VCPKG_ROOT

Describe your environment

• Windows 11
• Visual Studio Professional
• v1.19.0 tag

Steps to reproduce
Execute

tools\setup-buildtools.cmd

What is the expected behavior?
tools\setup-buildtools.cmd to complete successfully

What is the actual behavior?
The following error:

Building with vs2022 Professional...
**********************************************************************
** Visual Studio 2022 Developer Command Prompt v17.12.5
** Copyright (c) 2022 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'
Using existing vcpkg installation...
Computing installation plan...
error: while looking for gtest:x64-windows:
C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\ports\gtest: error: gtest does not exist
Computing installation plan...
error: try_read_contents("C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\scripts\vcpkg-tools.json"): no such file or directory
Computing installation plan...
error: try_read_contents("C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\scripts\vcpkg-tools.json"): no such file or directory
Computing installation plan...
error: while looking for ms-gsl:x64-windows:
C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\ports\ms-gsl: error: ms-gsl does not exist
Computing installation plan...
error: while looking for nlohmann-json:x64-windows:
C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\ports\nlohmann-json: error: nlohmann-json does not exist
Computing installation plan...
error: while looking for abseil:x64-windows:
C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\ports\abseil: error: abseil does not exist
Computing installation plan...
error: while looking for grpc:x64-windows:
C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\ports\grpc: error: grpc does not exist
Computing installation plan...
error: while looking for prometheus-cpp:x64-windows:
C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\ports\prometheus-cpp: error: prometheus-cpp does not exist
Computing installation plan...
error: while looking for curl:x64-windows:
C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\ports\curl: error: curl does not exist
Computing installation plan...
error: while looking for thrift:x64-windows:
C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\vcpkg\ports\thrift: error: thrift does not exist

Additional context
If I comment out call %TOOLS_VS2022_PRO% %ARCH% on line 64 of vcvars.cmd, it completes the build successfully. Adding some echo lines shows that VCPKG_ROOT is properly set prior to executing vcvars.cmd and then unset after executing vcvars.cmd