P: (iPad) Edits disappeared

my edits have now disappeared right before my eyes, "FULL galleries" THREE times. I have not closed out lightroom while on an edited image. I think the bug has something to do with the denoise or blur. This last time, I went in to used denoise on one picture. while I was waiting on denoise on my computer to go through, I looked over to my IPAD and watched as my edits started disappearing before my eyes. HOURS of work GONE. There is nothing I can do to get them back as it happened in grid view on my IPAD. To clarify, I tend to edit on my IPAD and my work sync's over to my Macbook Pro into LRC for me to finish up edits and place into a gallery. I am completely updated on both my comp and ipad. This is not acceptable. I don't know what to do?