Created attachment 337085 [details] Minimal application configuration to reproduce the bug The attachment contains a minimal case to reproduce the following issue. It includes a Dockerfile with a minimal application configuration, consisting of an html page, an empty service worker script and Nginx server. Nginx is configured to operate on ports 5000 and 5001. Server on port 5000 is used to serve index.html and serviceworker.js. It also performs a redirect to the second server which runs on port 5001 and serves file.txt. index.html has an <a> tag with ‘href’ set to ‘/redirect’. When a user clicks this link, navigating to :5001/file.txt, while being expected, does not occur. Safari version: Release 52 (Safari 11.2, WebKit 13606.1.9.3.1) OS version: macOS 10.13.4