Brush/Pencil Strokes Don't Appear Until I Click Away

I just downloaded a free trail of Toon Boom Harmony Premium, and whenever I make a stroke, wither it be from the paint tool or the pencil, nothing appears until I click a different part of the workspace. I used all default settings and changed nothing in any other way. I tested it with my Huion Tablet and just using the mouse pad, and no difference.

Is there a way to fix this?