The Computer Pattern Sewing Machine's shifting issue can be caused by a number of reasons, here are some common steps to fix it, hopefully it will help you.To clean the machine: First, make sure the machine is turned off and disconnected from the power source. Use a brush or blow can to remove any dust, fibers or debris from your sewing machine. This ensures that there are no clogged or stuck parts inside the machine.

Check Stitch Position: Check that the machine's pin position is correct. If the pins are not properly aligned, it can cause misalignment issues. Depending on your sewing machine model, fine adjustments can be made by adjusting the knob or switch for the stitch position.
Adjusting the thread: Make sure the thread is threaded correctly through the tensioner and guides of the sewing machine. Check that the line is securely attached to the tensioner and passes correctly through all guides and wheels. If the thread is threaded incorrectly, it may cause misalignment or other sewing problems.
Check the needle plate: The needle plate is the metal plate on your sewing machine through which the stitches pass to sew. Make sure that the needle plate is not damaged or displaced. If the needle plate is installed incorrectly or damaged, it may interfere with the normal operation of the sewing machine.
Reset the machine: Some computerized pattern sewing machines can be reset by software. Consult your machine manual for instructions on how to perform