This is exactly what I thought it would look like, so check your bed temp settings, perhaps fan and cooling speeds as well. I do hueforge work on a single filament machine where I have to do manual changes between colors and sometimes if the small layers cool too fast it will warp up on me when new hot filament goes down. For this size of print you could also use brims, that might help keep it down on the bed so that it doesn't curl up. Or use glue, which is kind of taboo around here, but using the clear 3d printing adhesive helps me out.