I'm tracing from a jpeg in the background but as I zoom in beyond 390 pt it disappears.
I am doing something a little abnormal so this might be expected behaviour:
I'm working on one large glyph, 5000 units across, for a lettering composition.
The images is large (about 2000 pixels square) but I've also enlarged it by 1000%
I'd still like to zoom on in the details though.
*Update: I just noticed that the image only disappears when I click on a node or handle above 390pt. It reappears when no points are selected as long as it isn't locked.
All the best