First, reproduce the issue using the provided jsFiddle link. Then, inspect the source code for the `getTextDimensions` method in the jsPDF repository (likely in `src/libs/`). The problem likely lies in how the method calculates width for certain Unicode or special characters. Look at the font metrics object and ensure it handles all characters correctly. Consider adding a test case with the characters from the fiddle.
getTextDimensions give wrong width · parallax/jsPDF#3310 | Good First Issue