[wp-trac] [WordPress Trac] #37857: Strange behaviour for COOKIE_DOMAIN since Wordpress 4.6

[WordPress Trac]

#37857: Strange behaviour for COOKIE_DOMAIN since Wordpress 4.6
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 Reporter:  indikatordesign  |      Owner:
     Type:  defect (bug)     |     Status:  new
 Priority:  normal           |  Milestone:  Awaiting Review
Component:  Customize        |    Version:  4.6
 Severity:  normal           |   Keywords:
  Focuses:  accessibility    |
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 I hope I am right here, because since the last update for WordPress 4.6
 there is a very strange behaviour with the by hand sedate constant
 COOKIE_DOMAIN.

 I have adapted COOKIE_DOMAIN in wp-config.php to be able to use the same
 login data about multible domains away.

 Since the update for WordPress 4.6 this causes problems with the browser
 cache for all dynamic data transfers, like forms etc. Not only in
 WordPress, but also in form-plugins or WooCommerce.

 With the example WooCommerce: data for the goods basket are updated always
 only after a renewed page-reload. That means, if you go to basket, no
 changes are active. You need to reload the basket to see the changes in
 action. The same behavior with changes in forms for addresses etc.

 Absolutely no caching module is active. If browser caching is disabled,
 everything works fine.

 These are the changes I've made for the COOKIE_DOMAIN in wp-config.php:

 {{{#!php
 <?php
 define( 'COOKIE_DOMAIN', '.domain.com' );
 define( 'COOKIEPATH', '/' );
 define( 'SITECOOKIEPATH', '/' );
 define( 'ADMIN_COOKIE_PATH', '/wp-admin' );
 define( 'COOKIEHASH', md5( 'https://' . COOKIE_DOMAIN ) );
 }}}

 If I escape them, everything works fine.

 Before the update everything functioned very well and without any
 problems.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37857>
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