Shared calendar is not writeable for certain user

Nextcloud version: 12.0.3
Operating system and version: Fedora
Apache version: Apache/2.4.27
PHP version (eg, 5.6): PHP 7.1.9 (fpm-fcgi)
Is this the first time you’ve seen this error?: yes

Can you reliably replicate it? (If so, please outline steps):
I have a system set-up with the following accounts:

When I create calendars with “Nils”, share them with others and give write access, other users see them as an abonnement instead of an editable calendar.

Also when I create a calendar with user “test1” and share it to “test2” and “Nils”, user “test” is able to edit the calendar and “Nils” is not. Eventhough both have write access.


The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

$CONFIG = array (
  'instanceid' => 'xxxxxxxxxxxxxxxxxx',
  'passwordsalt' => 'xxxxxxxxxxxxx',
  'secret' => 'xxxxxxxxxxxxxxxxx',
  'trusted_domains' => 
  array (
    0 => 'xxxxxxxxxxxxxx',
  'datadirectory' => '/var/www/nextcloud/data',
  'dbtype' => 'mysql',
  'version' => '',
  'dbname' => 'xxxxxxxx',
  'dbhost' => 'xxxxxxxxxxx',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'xxxxxxxxxxxxx',
  'dbpassword' => 'xxxxxxxxxxx',
  'installed' => true,
  'forcessl' => true,
  'maintenance' => false,
  'htaccess.RewriteBase' => '/',
  'overwrite.cli.url' => '',
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'updater.secret' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
  'theme' => '',
  'loglevel' => 2,
  'knowledgebaseenabled' => false,