pg15 and VM snapshots with pg_backup_start

Hi, we run a lot of PG14 and lower. We do VM snapshots, which we backup. Before the snapshot we run a quiesce script which also runs pg_start_backup(). After a few seconds the snapshot if finished and we call pg_stop_backup.

This is working file for us, but pg15 removed this function and replaced it with pg_backup_start(), which however requires the session to be open, otherwise we get:

    WARNING:  aborting backup due to backend exiting before pg_backup_stop was called

For pg15 do I need to keep the session open, will the snapshot contain uncorruped data?

thank you.

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OE