This may be because the Z axis is calibrated too close to the circuit board. Try performing a manual calibration of the printer by going to "Printer Tools" in the Sculpto app.
For larger objects, the circuit board can flex a bit for the purpose of causing the circuit board to drop. In addition, you can try with a spatula, dough scraper, etc. to remove the object with if it is really firmly attached. See the instruction video below for an example of how this can be done.