Boost package doesn't update to 1.87.0 ?

[ceesvn]

Describe the bug
My (manifest type) project doesn't update to boost 1.87.0, but keeps using 1.86.0

Environment

• OS: Linux
• Compiler: gcc 14

To Reproduce
Steps to reproduce the behavior:
Open the project in Visual Studio Code (this starts the vcpkg install command)
Even after clearing:

• the builds in the project,
• ${VCPKG_ROOT}/packages
• ${VCPKG_ROOT}/buildtrees
• ${VCPKG_ROOT}/downloads
• ~/.cache/vcpkg/archives/*
• ~/.cache/vcpkg/registries/*
  and pulling, bootstrapping the VCPKG_ROOT the project keeps rebuilding with BOOST 1.86.0
  (there are no version-number specified in my configuration files!)

Expected behavior
Rebuild the project

with Boost 1.87.0

Failure logs

log (excerpt).txt

Additional context

vcpkg.json

I can't find any (in)direct references to Boost 1.86.0 in (my) project-files.
cloning the vcpkg-tree from git shows version 1.87.0 in ${VCPKG_ROOT}/ports/boost/vcpkg.json
browsing the packages on 'https://vcpkg.io/en/package/boost' shows version 1.86.0 ...