Datastream to BigQuery Converts all columns to datatype string

I’m following the “Implement Datastream and Dataflow for analytics” guide to set up data replication from a Postgres database into Bigquery.

https://cloud.google.com/datastream/docs/implementing-datastream-dataflow-analytics

This is mostly working well, but one issue we have come across is that all columns on the bigquery side appear to be converted to a String datatype, ignoring the original postgres datatype in the source.

Has anyone else come across this, or can suggest a possible solution? Thanksyou.

Can you please include the PostreSQL version of your database; in addition, if possible, examples of the fields that are automatically changed to String data type?