This could be related to available disk space, but we’ve also been getting a few reports of browsers randomly wiping extension data due to a bug in the IndexedDB implementation. Unfortunately, there’s not much an extension can do to protect against that beyond saving data to the cloud, which is a forthcoming feature. In the meantime, make sure to back up often.
To help us identify a pattern, can you tell us which browser and version you’re using?
Thanks,
Hans
Went to click on "what's new button" and when I attempted to click back on my content everything was just....gone. Collections....History....gone. WTF? Super annoying.