The Postgres "Bulk Insert" runs forever if the underlying data query is NULL or UNDEFINED.
See here a screenshot as example, query2 is being used in query1 as the data source. If query2 never ran or failed during execution, query1 will run forever.
I would expect it to throw an error or run with 0 inserts, but not running forever.
My Retool version is 2.95.6 and it's running on-premise.
