My Nuxt application behind Cloudflare Pages sends out multiple
set-cookie headers. All of them get concatenated with a comma “,” which prevents users from logging in. This is incorrect behaviour due to RFC 6265 prohibiting folding multiple Set-Cookie headers into a single header.
https://developers.cloudflare.com/workers/platform/headers/ for more information.
The issue affected CDN/Cache in the past and has resurfaced for Pages. Here’s link to the old incident:
https://www.cloudflarestatus.com/incidents/30ptcb3b0s2w and the thread