Why does the Xiaomi Pad 7 Pro's smart pen cause lines to appear erratically (flying lines) when writing?

Thank you for your support of Xiaomi products. Both the tablet and stylus undergo strict professional inspection before leaving the factory, so you can use them with confidence.
If you experience erratic lines (flying lines) appearing unexpectedly when writing with the Xiaomi Focus Pen, this can be due to software optimization issues in earlier versions of the system. Xiaomi has identified and addressed this issue in the latest system update, improving the overall pen performance and writing accuracy.
To resolve this problem and ensure a smoother, more natural writing experience, please update your tablet's system to the latest version.