Unwanted lines when cutting

I keep getting these random line when I do cuts as shown in the pictures. How can I avoid these lines. I appreciate your assistance with this.

This looks like stray RF interference because the motion resets right away.

Do you have a DC motor running nearby?
Has your vent fan set up recently changed?

Do any of the stray lines show up on the Preview window?
Are the stray lines and letter-jumps in different places each time?

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