Delamination issue Ender 3 Pro PLA
This is under extrusion, not delamination. Delamination is the result of the under extrusion.
It typically happens when the wrong filament diameter has been set in the slicer (a larger diameter than used, e.g 2.85 mm instead of 1.75 mm). Another option is that you accidentally put the printer in volumetric printing mode which is accessible through the display of the printer:
Control -&gt; Filament -&gt; E in mm³ -&gt; Disable
Other solutions may be found in the extrusion process, e.g. the extruder may be skipping.