PLA Issue printing first 3 mm with Ender 3 Pro
This answer hints to the correct diagnosis but doesn't explain how to fix this in Cura or any other solution other than babysteps. You don't want to adjust babysteps at every print...

Basically, your nozzle is too close to the bed (from comment 0.1&nbsp;mm to be exact). To increase the distance between the nozzle and the bed you can:


level with a little thicker paper,
move the bed down on all corners,
move the Z endstop up,
redefine the Z=0 in your start code,
G1 Z0.1 ; Move to 0.1 mm height
G92 Z0  ; Redefine zero height
install Cura plugin "Z Offset Setting" from fieldOfView (through the Cura Marketplace) and define a Z Offset of 0.1&nbsp;mm, and/or
increase the first layer height a little.