It's a good app but something is wrong – Superimpose+:Background Eraser Review

I'm a big phone editor and I use this app to motion mask, but recently after I cut out the background, in a few days the background will be restored to the picture but it's just white...so I have to comeback here and cut it out again. I've been using this app since late 2015 early 2016 and this has never happened to me before? Please try and fix whatever's going on
Review by J4M1SON 2ooI on Superimpose+:Background Eraser.