Evaluate Persistence does not work

[bar35643]

I got errors occurring if tried to evaluate persistence with the given script:

• by_init=True -> AttributeError: 'DataArray' object has no attribute 'time'
• by_init=False -> KeyError: "not all values found in index 'time'"

Also the docs do not describe how to fix it either how the options has to be set.
Is there an easy workaround to solve it?
Thank you in Advance.

Command:
python evaluate.py --forecast_path=gs://weatherbench2/datasets/hres/2016-2022-0012-64x32_equiangular_conservative.zarr --obs_path=gs://weatherbench2/datasets/era5/1959-2022-6h-64x32_equiangular_conservative.zarr --climatology_path=gs://weatherbench2/datasets/era5-hourly-climatology/1990-2019_6h_64x32_equiangular_conservative.zarr --output_dir=./tmp/ --output_file_prefix=persistence_ --regions=global --eval_configs=deterministic --evaluate_climatology=False --evaluate_persistence=True --time_start=2020-01-01 --time_stop=2020-12-31 --by_init=True --variables=geopotential,temperature,u_component_of_wind,v_component_of_wind,specific_humidity,2m_temperature,10m_u_component_of_wind,10m_v_component_of_wind,mean_sea_level_pressure