Time reconstruction for long signals

Using time_marginalization with 128s long signals, the time reconstruction fails with this error

 File "/fred/oz117/gashton/miniconda3/envs/mpi-bilby/lib/python3.7/site-packages/parallel_bilby-0.1.0-py3.7.egg/parallel_bilby/analysis.py", line 46, in fill_sample
  File "/fred/oz117/gashton/miniconda3/envs/mpi-bilby/lib/python3.7/site-packages/bilby/gw/likelihood.py", line 320, in generate_posterior_sample_from_marginalized_likelihood
    signal_polarizations=signal_polarizations)
  File "/fred/oz117/gashton/miniconda3/envs/mpi-bilby/lib/python3.7/site-packages/bilby/gw/likelihood.py", line 403, in generate_time_sample_from_marginalized_likelihood
    "Time posterior reconstruction failed, at least two samples "
bilby.core.likelihood.MarginalizedLikelihoodReconstructionError: Time posterior reconstruction failed, at least two samples are required.

@colm.talbot suggested that the reference time being set to the data start time may be the culprit.

I'll try adjusting that and see if it helps.