When I upload some tokens/maps into the game I'm dm'ing, they work fine at first but then the next time I log on to work on some prep I see that they've deleted themselves from my library. There is no correlation with the different images uploaded because they are all .png/.jpg and some have even been uploaded and were fine for several months. With the rules disappearing they become corrupted and I have to reload them only to disappear again... I have never had this issue before and has only started recently.