Hi and welcome to Justanswer.
Initially, I need more information for me to make all things clear. You mean your needle is not go back to the center position? Did you try to set it to zigzag and then see if the needle goes back to the center.
If still, remove your face plate cover, spray aerosol lubricant (for sewing machine) do not use wd40. Then try to sew again in zigzag mode until the lubricant penetrate and your needle go back to the center.
Hope this information will be helpful.
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