Repeated pushes cause 30 mins time out

Customer runs 2 Quay servers on AWS, so the image storage is on S3 and the DB is a RDS Postgress DB:

We have a project that is experiencing a 30 min timeout when they continually push an image to a Quay organisation. Normally these images would take 10 - 30 secs to push. We can re-create the issue by doing the following:
Create a docker image
Push the image on a repeated loop (200 times)
At some point during the loop process, the docker push command will time out for approx. 30 mins.
During this 30 min period all other docker push commands to the same organisation will also time out for 30 mins.
After 30 mins the docker push commands will continue to run.