Differences between ports build and poudriere

I'm a new porter and have run into a weird situation I'm having trouble resolving. Any assistance would be appreciated.

On my server, science/libtensorflow1 does not attempt to download anything.
However, I'm getting regular mail from pkg-fallout@ saying that this is happening on the main build servers and I'm at a loss as to why that might be. This is quite possibly bazel related, although the concerning file is listed in the Makefile for pre-fetching.

grep rules_closure Makefile
GH_TUPLE=       bazelbuild:rules_closure:308b05b2:bazelbuild_rules_closure \

Here's the relevant snippet from pkg-fallout:
WARNING: Download from https://storage.googleapis.com/mirror.tensorflow.org/github.com/bazelbuild/rules_closure/archive/308b05b2419edb5c8ee0471b67a40403df940149.tar.gz failed: class java.net.ConnectException Can't assign requested address (connect failed)
WARNING: Download from https://github.com/bazelbuild/rules_closure/archive/308b05b2419edb5c8ee0471b67a40403df940149.tar.gz failed: class java.net.ConnectException Can't assign requested address (connect failed)
ERROR: An error occurred during the fetch of repository 'io_bazel_rules_closure':
  java.io.IOException: Error downloading 

Environment:
FreeBSD 13.0p11
Poudriere 3.3.7_1

Command:
poudriere bulk -j 13-0 -p $port_tree science/libtensorflow1

poudriere.conf:
ZPOOL=zroot
ZROOTFS=/poudriere
FREEBSD_HOST=https://download.freebsd.org
RESOLV_CONF=/etc/resolv.conf
BASEFS=/usr/local/poudriere
USE_PORTLINT=yes
USE_TMPFS=no
MAX_MEMORY=16
DISTFILES_CACHE=/usr/ports/distfiles
BAD_PKGNAME_DEPS_ARE_FATAL=yes
ALLOW_NETWORKING_PACKAGES="photoprism"
PARALLEL_JOBS=4
SAVE_WRKDIR=yes
ALLOW_MAKE_JOBS=yes

make.conf:
DEVELOPER=yes
MAKE_JOBS_NUMBER=4

Any ideas on differences between poudriere and the build cluster which might impact this? I'm a bit stumped.

I have tried turning off ALLOW_NETWORKING_PACKAGES, still didn't cause the error.

Thanks,
Paul