Portal.min.js causes GET 400 Error In Major Ghost Sites

Hello,

This problem occurs after activating members within labs:

mozilla

(Cookie ghost-members-ssr not found).

portal.min.js:3 should be related.

I’m using Nginx Plus Release 23, and this problem arises on several high-profile clients like:

So, apparently it’s a pass-cockies bug more than a setup-specific issue, this error cannot be tolerated as the clients are too strict.

Any insight will be greatly appreciated.

I’d like to confirm that this is the case. I see this problem on blogs which call v0.15.0 of portal.min.js.