Yuu

(hopefully the images uploaded) So I was printing a part which has a horizontally positioned hole in it and discovered that layers would be missing right about where the hole starts (refer to pic). As a result, I did some tests by printing cubes with a hole going right through the centre (and one solid cube). Strangely, only the cube with the horizontally positioned hole would fail. The other two cubed were fine (solid and one with a vertical hole) - indicating that the printer is performing fine. Is this an issue that can be fixed? If so please can you help me?