I created a doc 6 months ago and had to revisit it to create some social media graphics. I had created a pattern and saved to my swatches in illustrator. Since the updated version, Illustrator does not open my file correctly and my patterns have been turned into images. They are no longer vector patterns, and I cannot edit whatsoever.
This had also happened to a photoshop file with artboards -- the artboards disappeared and my files had been flattened.