The answer can be BOTH. Managers have often asked me how to deal with an employee who is disruptive (that does not necessarily mean all disrupters have a bipolar condition). Anxiety disorder has become one of the most common mental health conditions.
When Carol was in her manic phase, she was one of my most energetic, creative and successful employees. Carol (not her real name) would work until midnight to meet impossible deadlines she often self-imposed. The next morning, she was at it again, all while filling any potential time voids with volunteer project work.
If you manage a large team or even a few people over a number of years, chances are you’ve encountered an employee struggling with an anxiety disorder. React well as a leader/manager and you’ll help the struggling employee recover and contribute to your organizational success. Pile onto their problem and you’ll help send that employee, and your results, into downward spiral.