Object storage public read does not work for some folders

We have created a private bucket for object storage. Then we decided to change it to public. Changing to public works for some of the folders in the bucket bu does not work for some folders in the same bucket. This is a serious problem we face in the production environment.

We are using Django 3.1 and we have django-storages loaded in the backend. We have added
AWS_DEFAULT_ACL = 'public-read'
AWS_QUERYSTRING_AUTH = False

parameters to settings.py to move from private to public in the images.

Any idea for the situation.

Best Regards