Wall and layer separation - Ender 3

Hey,I've been printing with an ender 3 for a few months and everything was perfect.These days I was printing sanitary masks and also very well, until yesterday when I did this wrong (same gcode):
https://img.overpic.net/thumbs/d/3/z...tksz26b_s.jpeg

and today I was printing some super simple pieces and it has made me this mess:
https://img.overpic.net/thumbs/x/6/l...dwtxgnt_s.jpeg

there is like a separation between the whole extrusion, between layers and on the walls. The piece has been separated very easily.It seems as if there was a lack of material but it is very exaggerated.Does anyone see the solution?. Thank you!