For example I have configured two custom user_fields: 1 and 2
Executing the following request to update custom user_field 2 clears the content of the custom user_field 1:
curl -X PUT -d 'user_fields[2]=Lorem ipsum' http://discourse.example.com/users/john-doe.json?api_key=test_d7fd0429940&api_username=test_user
In the past this request only changed the content of custom user_field 2 and the content of custom user_field 1 was unchanged.
Was this change of the custom user_fields update intentional?
Tested with Discourse version 1.8.10