BUG - Todo task in workflow doesn't work

From version 4.4.1 the Todo task in workflow doesn't work. Checking the code I find a difference in VtigerCRMObjectMeta.php at line 383.
Selecting all the fields of tabs 9 and 16 (Calendar and Events) makes an overwrite of Events fielads in array values at line 428 becouse the key is the fieldname. The fields name in Calendar and Events are the same but not the Mandatory or Optional data. I mean the field eventstatus in Todo is Optional but in Events are Mandatory so also for Todo the eventstatus became Mandatory but is empty on creating a Todo.

My question is: why did you makes this change? What are the feature of crmv@39110 crmv@33136 that makes this change?

Ho to fix it?