Everything happens for the first time. This statement comes true with Zabbix rather often lately. Could be due to a rapid growth.
Normally, Alexei is the one that directs Zabbix development: which bugs are meant to be fixed and which features are meant to be implemented. However, sometimes Alexei is too busy to pay enough attention to what developers are doing, and that is a chance to do some hacking. Here is one of them.