Hi @jmann, thank you for looking into this.
We recently updated our FastAPI version (which is generating our OpenAPI spec) from 0.70.1 to 0.109.2, which included an update of OpenAPI version from 3.0.2 to 3.1.0. I can see that if I try and use the last version of our spec on OpenAPI version 3.0.2, there is no delay in the queries, but the first version of the spec using version 3.1.0 has the excessive execution time.
I can't seem to tell why this is happening, but in the interim, we can downgrade back to 3.0.2 to get our apps back up and running. I'm happy to share both the last working version and the first problematic version of our OpenAPI spec with you if that would help you to debug from your end!