I am creating a folded part and when I edit certain cut features in the flat pattern it sometimes goes transparent after updating and also adds in a cut issue. There is no discernible issues with the model itself nor any errors or warnings coming up. I have done about 10-20 similar models to this and this has started occurring more frequently. It typically happens after editing the cut-extrude but on the latest occurrence it happened after the LPattern1. I have continually saved progress and even tried checking in/out before it happens but it always inevitably happens. 

I have attached photos showing what I mean, but unfortunately I cannot share the model itself.

Please let me know if you have questions or I can provide additional info.