Tasks shouldn't be reassigned to out of the office users

Summary

Tasks can be reassigned to out of the office users

Content

Hi experts,

There should not be able to reassign Task to out of the office users.

The first user sets the "Out of Office" option in My Tasks-->Workspace-->User Preferences (see figure 1).

The second user acquires the task (see figure 2).

The second user reassigns the task to the out of the office user (see figure 3)

The first (out of the office) user confirms the task is reassigned to him (see figure 4).

Isn't that is a bug?

It should never happen.

My users see it as a severy process flaw.