ingress_annotations() treated the two controllers as either/or: choosing traefik dropped the nginx proxy-body-size annotation, so on a cluster routed by nginx the 50 MiB upload cap silently became nginx' 1 MiB default and uploads failed with HTTP 413. An ingress annotation only acts when a controller of that family routes the ingress, so emit both annotation sets always: nginx's size and timeout annotations (plus the rewrite-target null that keeps API paths intact), and the Traefik middleware reference on top when the config says traefik. The Middleware object is created as before.
Version 1.6.2.
Igor