looks weird. so the layers suddenly no more stick to the part?
most obvious for me would be you selected high flow filament (like Bambu Original) but prints with other brand with less flow. the rest of the print settings are fixed and working for many people. please check if you used generic Pla if you are not using original Bambu Pla and let me know if this helps. good luck!
I printed this for my father who loves to eat pistachios but always ate them from the table and ended up with a big pile of shells
he loved it and used it everyday, only comment would be that it is a little to big just for one or two people but otherwise good design