[BUG-REPORT] why the same dataframe and same groupby(vaex.agg.list) operation, one got error and one got correct if i export to hdf5 and loaded it back

[Yihao120]

version 4.17.1

error

df.groupby(by=['a', 'b', 'c']).agg({'res1': vaex.agg.list('d')})

correct

df.export_hdf5('tmp.hdf5') df = vaex.open('tmp.hdf5') df.groupby(by=['a', 'b', 'c']).agg({'res1': vaex.agg.list('d')})