According documentation it should be implemented the following way:
/**

• When a note is added to a bug currently in $g_bug_feedback_status, and the note
• author is the bug's reporter, this option will automatically set the bug status
• to $g_bug_submit_status or $g_bug_assigned_status if the bug is assigned to a
• developer. Defaults to enabled.
• @global boolean $g_reassign_on_feedback
  */

Do you see another behavior than the documented one?
If so, it's a bug.

If not, you can disable it by adding the following line to config_inc.php
$g_reassign_on_feedback = OFF;

I think the current rule is quite good for typical use cases. Setting to "acknowledged" whenever a reporter adds a note to an assigned issue is certainly most of the time not what you want.

Do you agree that I can close this issue?

I agree and $g_reassign_on_feedback = OFF; is exactly what i'm looking for.