I am not a psychiatric professional but "with psychotic features" to me (from what I've heard and observed over the years) could mean that occasionally you have had delusional thinking, hallucinations whether auditory or visual, or some other type of experience which was not within the realm of reality.

"Manic episodes can also have psychotic symptoms present. Psychosis is a state in which a person is unable to tell the difference from reality and unreality. Psychosis symptoms include hallucinations, false beliefs about having special powers or identity (such as superhuman strength or X-ray vision). Psychotic symptoms indicate a severe mood episode that requires immediate medical attention and treatment." - PC website

These could specifically include delusions, hallucinations, disorganized speech, grossly disorganized or catatonic behavior, detachment.....I'm sure there's other things I don't know about.