MySQL Workbench 6.1.7 - missing collation when utf8mb4 character set is used (no replies)

I'm using MySQL Workbench version 6.1.7.11891

When creating database (create statements) from model (Database -> Forward Enginner - Ctrl + G) MySQL Workbench does not add COLLATION for database when utf8mb4 character set and COLLATION utf8mb4_unicode_ci is used. For schema all it generates is:

CREATE SCHEMA IF NOT EXISTS `mydb` DEFAULT CHARACTER SET utf8mb4 ;

If I change database character set to utf8 and choose utf8_unicode_ci collation, it generates next lines:

CREATE SCHEMA IF NOT EXISTS `mydb` DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ;

Just wanted to notice about this behaviour.