Hi I have an ender 3 v3 KE printer and I’m new to this. My test print came out great with no issues (different model). Before printing again I rethreaded the filament and recalibrated the printer, I ensured the nozzle was 230C. Then I tried printing a second project with two pieces, I watched the two first layers start the print and it looked good (didn’t move around). When it was done the bottom half of piece2 came out warped and with strings coming off but the top half of the same piece2 is perfect. Piece1 that printed at the same time came out perfectly and fits well into the other piece. Why would the bottom half of piece2 come out stringy and poorly printed (top half perfect)?