file corrupts when I edit certain parts

Whilst writing, I noticed whenever I would make any edit to the piccolo part, the score would become corrupted in the piccolo part. Whilst a nuisance, I decided to make a secondary piccolo part to write in temporarily. Then, the same thing started happening with the violin part. Any time I would touch the part on the main score, the score would become corrupted. Is this an issue that has a known fix? I’m worried for my score as it is very large. The issues occur around 785 for the piccolo and 788 for the violin, though I haven’t extensively tested it.