Stellar smoothing lengths stored as 0.0

I recently ran a 1380 snapshot version of the EAGLE 12.5Mpc box using the EAGLE-XL subgrid model to produce outreach videos. In doing so I have found a (small but significant) number of the snapshots which have stellar smoothing lengths of 0.0 for all stellar particles.

To extract these I used swiftsimio and the following calls:

from swiftsimio import load
data = load(path)
hsmls = data.stars.smoothing_lengths.value
print(np.min(hsmls), np.max(hsmls))

which prints: 0.0 0.0

The version details are as follows (from the log file):

 Version : 0.9.0
 Revision: unknown, Branch: unknown, Date: unknown (Not sure why this is producing unknown, I pulled shortly after Matthieu's email stating the release of version 0.9.0 but I have moved stuff around a fair bit so the related git files me be absent in this directory (?))
 Webpage : www.swiftsim.com

 Config. options: '--with-subgrid=EAGLE-XL --with-hydro=sphenix --with-kernel=wendland-C2 --enable-ipo --with-tbbmalloc --with-parmetis --enable-mpi --enable-parallel-hdf5 --with-hdf5=/cosma/local/Modules/modulefiles/libraries/parallel_hdf5/1.10.6'

 Compiler: ICC, Version: 19.10.20200623
 CFLAGS  : '-idirafter /usr/include/linux -ip -ipo -O3 -ansi-alias -xCORE-AVX512 -pthread -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free -w2 -Wunused-variable -Wshadow -Werror -Wstrict-prototypes'

 HDF5 library version     : 1.10.6
 FFTW library version     : 3.x (details not available)
 GSL library version      : 2.5
 MPI library version      : Intel(R) MPI Library 2019 Update 8 for Linux* OS (MPI std v3.1)
 ParMETIS library version : 4.0.3

The call to actually run swift (and load modules in the batch script) was:

module load intel_comp/2020-update2 intel_mpi/2020-update2 ucx/1.8.1 parmetis/4.0.3-64bit parallel_hdf5/1.10.6 fftw/3.3.8cosma7 gsl/2.5

mpirun -np 32 ./swift_mpi --pin --cosmology --eagle -v 1 --threads=14 eagle_12.yml

The data can be found at: /cosma7/data/dp004/dc-rope1/SWIFT/hydro_1380/data/

There are a number of snapshots with 0.0 valued stellar smoothing lengths but one particular example is ani_hydro_1334.hdf5