Negate not been respected

[instasck]

Describe the bug
I have a "follower" object, with many to many language field have "he" and "ar".
I choose "he" and not "ar":

But I did find Arabic (ar) in the results:

and checked that this user have "ar":

DEBUG LOG:
DEBUG {'children': [['language__code_name__iexact', 'he'], <Q: (NOT (AND: ['language__code_name__iexact', 'ar']))>, ['gender__iexact', 'female']], 'connector': 'AND', 'negated': False}

So why he shows up in results ?

Details (please complete the following information):

• OS: [e.g. iOS]
• Python version [e.g 3.7] 3.7.4
• Django version [e. 2.1]
• django-advanced-filters version [e.g 1.1]
• Browser [e.g. chrome, safari] chrome

[instasck]

So once the NEGATE condition is first it will work.
Once I do like this:

It will not work.