If condition with null result

I have a form with the following question:

If someone clicks in 'Other', I want the result to be blank.

if(equals(body('Get_response_details')?['body/r4dfb71fbd2524e51a266e3618cc7aa27'],'Other'),'',outputs('Get_response_details')?['body/r4dfb71fbd2524e51a266e3618cc7aa27'])

 

Why is the 'Other' not blank?