Hi Ramon Tan,
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From your description, your instinct is actually very reasonable - this kind of behavior is often not a hardware fault, but could be a combination effect between display scaling and mouse sensitivity.
On a high‑resolution 16-inch display like yours (2560 x 1600) with scaling set to 225%, very small pointer movements can get exaggerated visually, especially if the mouse DPI (sensitivity) is also high. This can make the cursor appear to "tremble" when hovering over tiny UI elements like cell borders, even though the mouse itself is functioning normally.
Could I ask you to try a quick check? Does the issue improve if you lower either the display scaling or reduce the mouse DPI/sensitivity, or both together? This simple test can help confirm whether it's the interaction between scaling and sensitivity rather than a defect with the mouse or laptop.
Also, one small but important question: are you currently using a mousepad? If not, I would strongly recommend trying one. A proper mousepad gives the sensor a consistent surface to track on, which greatly improves accuracy - especially on your case. Even good mice can behave unpredictably on uneven or reflective surfaces, so this simple addition can often smooth things out more than expected.
If you have further information, please feel free to let me know.