When conceived of in this manner, implicit bias is a normal behavioral phenomenon: It happens to everyone all of the time. From a moral point of view, however, implicit social bias is a highly controversial phenomenon.
I selected this part of the article to highlight as it ties into the main point of the article. Implicit bias is completely normal, but on the other hand it raises moral and societal controversies. The social consequences being discrimination or unfair treatment which are considered problematic.