Layers turning Blurry on Fresco

Hey,

I am having some issues with Fresco, certain pixel layers will suddenly turn blurry and when you zoom in the lines are no longer crisp, just even blurrier. 

I have tried reporting the glitch but have had no response as of yet. I am losing hours of work and living in fear everytime I spend some time drawing something that it's going to go blurry!

Is anyone else experiencing this?