The text in model space does not appear in layout in certain scales.  Everything is at 3/4" scale but when I move from model space to layout the text disappears. If I enlarge the scale to something larger it reappears.  Why is that?

See attached drawing, model space and layout 4 in particular.  I want the text to appear in the drawing at 3/4" = 1'-0".

Any help would be appreciated!  Thank you