Hundreds Of Files Go Missing

I have been using Fresco for years. I draw every night. I moved to Fresco from ProCreate because of vector. I've been working on an animated series and have been exporting ZIP files of PNGs once I finish a plate. Then I animate in Photoshop. So I have media date-stamped, proving I have created it. Recently, I have noticed hundreds of my files have vanished. In checking Files, there is one or two drawings from, say, a month when there should have been 20.  I have written to Adobe on this issue before. And I get stonewalled. I often alternate between two iPads but this shouldn't be the problem. I've plenty of storage and pay a fairly hefty fee per month to use Lightroom, Photoshop and Fresco. I think there's a serious flaw in Adobe's cloud.