Partially broken screen
So I've gone to use my tablet today (KAMVAS 13) and there's an issue with the screen. It picks up the pens position everywhere but there's 1 spot that won't pick up when the pen is actually touching the screen. Everywhere else works perfectly fine but 1 part of the screen can see the pen but won't allow it to draw. I've outlined the space in photoshop so see where it won't work and I don't know what the do. I can draw in the space if I start a line from outside it but when I touch the screen inside the space it won't work?I've changed the nib multiple times and restarted my computer. Is the screen just broken?