Azure AD B2C authorization code and refresh token size increase update

yoelh this seems to have been partly rolled out yesterday, it caused intermittent issues with our SPA (using PKCE) as the querystring length returned is longer than the max default in .Net core.  Assume MS have load balanced between old (small) version and new (large) version.

As it was intermittent it was hard to track down this change as being the cause, we're struggling to find any release notes around this which would have allowed us to pre empt any issues.