Hi
I have been facing same issue and it started to appear more often (almost daily on our BQ copy jobs)
GCP Support: After talking to GCP support, they pointed out that the ODBC drivers used by BigQuery connector in ADF are outdated. As per them, new updates were introduced in July-2023 (3.0.2.1005) whereas Microsoft is still using 2.4.5.1014. This maybe the cause. I don't know how often Microsoft updates the drivers for serverless-instances. On top of that, Microsoft doesn't let us create a support ticket from within the portal. Somehow the automatic troubleshooter finds no problem against pipeline RunID and terminates the request. This is absolutely bizarre.
For context: Copying data from BigQuery to Azure is done through the ODBC drivers, which is a piece of software that is written by Google as an efficient interface to BigQuery. However, this piece of software must be run on a server, which uses the ODBC driver to load data and then writes it into the destination. This is done by Microsoft Azure.