[GitHub, VS2019] (All) MSVC builds immediately hang, with CPU=100%

https://reactos.org/getbuilds/
0.4.15-dev-2268-gade5413-x86-msvc-win-dbg (MSVC_19.24.28314.0)
still works fine.

–

https://github.com/reactos/reactos/pulls
recent builds at least
immediately (after BIOS) hang, with CPU=100%.

Affected: MsVC, MsBuild, VSSolution.

—

Gcc
still works fine, from both sites.