Issues with Artifact uploads after upgrade to V9.3

We’ve just upgraded our gitlab instance from V9.1 to V9.3 and have started hitting issues where artifacts from our CI runners are not able to be uploaded after build.

This seems to be due to the server returning 500 errors. Upon digging we see nginx is erroring out apparently due to incomplete data being received

2017/07/12 14:35:29 [crit] 4513#0: *151962 pwritev() "/var/opt/gitlab/nginx/client_body_temp/0000000760" has written only 3885 of 8184, client:, server:, request: "POST /api/v4/jobs/21501/artifacts?expire_in=1+day HTTP/1.1", host: ""

Has anyone else seen something like this?