Globals are dropped when writing Table

Hail Query & hailctl
1

Hi,

I want to report what I think it is a bug in the Table.write API.
For testing purposes, I am writing a slice of gnomad’s variants dataset like so:

# hail 0.2.126
import hail as hl
ht = hl.read_table(
            "gs://gcp-public-data--gnomad/release/3.1.2/ht/genomes/gnomad.genomes.v3.1.2.sites.ht",
            _load_refs=False,
        )
subset = ht.select_globals().head(20).to_spark(flatten=False)
subset.write(MY_OUTPUT_PATH)

Originally, I see that gnomad’s table does contain a list of globals. However, when I inspect my exported table, no globals are set:

my_subset = hl.read_table(MY_OUTPUT_PATH)
my_subset.describe()
>>> ----------------------------------------
Global fields:
    None
----------------------------------------
...

Am I doing something wrong at the moment of reading/writing the data?

Thank you very much!
Irene