I have this odd problem that has happened twice now with the present time being the third. QIQI Tech 1 2018 printer model. I print a model, remove process and model from screen, import new model, set up new procees, send to printer Via USB, and prevous printed model prints out again. Tuning printer off and back on, clearing S3D of everything closing, restarating pc, reload second model and setup process and send to printer again and the first model prints again. Nothing stored on printer SD card. Does S3D cache stuff somewhere I could check and clear, or does it "drip feed" the printer when printing? It's only happened twice and I never really figured out what fixed it.