Hi. When Cura is slicing my model with 3D extruded text, some characters tend to go missing. I am trying to print a guitar pick with text and a hole above the text to put in a keychain. Please see the pictures. The hole is missing once the same model is sliced. Any reason why this is happening? In other cases, entire letters go missing. I'm using a 100 micron layer height with 50 mm/s print speed. Thanks