SELECT 'a' = BINARY 'A' returns 1 (utf8 charset, utf8_unicode_ci collation)

In MariaDB 10.0.14 and higher, the following expressions return inconsistent values.

SET NAMES utf8 COLLATE utf8_unicode_ci; 

SELECT 'a' = BINARY 'A'; /* yields 1, expected 0 */

SELECT BINARY 'A' = 'a'; /* yields 0, expected 0 */

The problem occurs when 'a' has a case insensitive utf8 collation.
MariaDB 10.0.13 does yield 0 in both cases.