To me, it looks like your speed and or acceleration on the X-axis is not right or the X-axis belt is loose. It doesn’t look like you have the same problem on the Y axis.
Is the frame a line ?, and is the text and qr code fill? What are the parameters?
The top and bottom of Wifi logo is not concerned by the default. So I exclude any mechanical problem (belt is well tensioned , no abnormal mechanical play)
Lightburn is newly installed, I imported the 2 jpg pictures and just set speed and power of Laser before engraving.
Maybe speed & acceleration… I’ll change these parameters !