Queryset JsonField filtering doesn't work as expected

[Michael]

Hello. I use Django 4.2, psycopg2 2.9.6 and postgis/postgis:15-3.3-alpine as database in my project.

Previously json field filtering worked as expected 'extra_datahello="world"' returned me queryset where objects extra_data json field contained {"hello": "world"}. Now I noticed queryset is empty. After some manipulations with query it start work after adding "iexact".

I expected if json field is {"hello": "world"}, objects.filter(extra_datahello="world") or objects.filter(extra_datahello=some_variable) should return this object in query set, but it doesn't work. objects.filter(extra_datahelloiexact="world") fix this problem.

Here are queries example:

>>> token='world'
>>> str(UserSocialAuth.objects.filter(extra_data__hello__exact=token).query)
'SELECT "social_auth_usersocialauth"."id", "social_auth_usersocialauth"."user_id", "social_auth_usersocialauth"."provider", "social_auth_usersocialauth"."uid", "social_auth_usersocialauth"."extra_data", "social_auth_usersocialauth"."created", "social_auth_usersocialauth"."modified" FROM "social_auth_usersocialauth" WHERE ("social_auth_usersocialauth"."extra_data" -> hello) = \'"\\"world\\""\''
>>> str(UserSocialAuth.objects.filter(extra_data__hello__iexact=token).query)
'SELECT "social_auth_usersocialauth"."id", "social_auth_usersocialauth"."user_id", "social_auth_usersocialauth"."provider", "social_auth_usersocialauth"."uid", "social_auth_usersocialauth"."extra_data", "social_auth_usersocialauth"."created", "social_auth_usersocialauth"."modified" FROM "social_auth_usersocialauth" WHERE UPPER(("social_auth_usersocialauth"."extra_data" ->> hello)::text) = UPPER(world)'

Could you give me advice how to fix this issue?
Thank you