LDS Notes Deleted

Some of my notes have been completely deleted- ones I haven't even viewed since they were last saved. Does anybody know why that would be? Is there a glitch? I know they were saved beforehand.

Are these notes you took using the Gospel Library app (on a mobile device or Windows 10), or were they notes taken using the web app on lds.org?

All my notes looked like they were deleted too - very upsetting. But I found a link in one of these forums which I used to access the old format. Now each time I log on it remains in the old format. I believe the link is this: https://www.lds.org/study-tools/folders?lang=eng#
If not look further in the forums.