Bug

@Marina_Tomaz0125 I don't have this problem. I do save often, and also part of my workflow, save version control if needed. But typically, I work in the original file application then export the file as a PDF when the time comes as making edits is faster unless working on delicate items like forms, but then I start to save frequently.  And try to stay within that app versus switching to ther apps at the same time — also make sure you have alot of RAM. If another app demands more memory, the OS may silently shut down background apps to free up resources.