I just installed version 4.1 for Mac. I had previously been using 4.0 with my Creality Ender 3 Pro (stock firmware). I sliced a small print with 4 small identical wire clips using the same settings that carried over from 4.0. It gave an estimated time of 55 minutes to print. I started the print and immediately noticed that it was pausing for several seconds at the end of each layer for each piece. I let it print several layers to see if it was just something with the first (or first few) la