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swift_mpi hangs during dmo run

I've been testing swift with some DMO runs (zooms, but using a single parttype to conform with swift).

Running the code in mpi the simulation hangs at the same timestep, even after a few attempts (z~23), but running without mpi it completes fine.

It's a DM only run, 315**3 particles.

mpirun -np 4 ../../../swiftsim/examples/swift_mpi --pin --cosmology --self-gravity --verbose=2 --threads=16 Sibelius_Test_Swift.yml

I've attached the output and param files.Sibelius_Test_Swift.yml

SwiftTest.dump Sibelius_Test_Swift.yml

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