That's actually pretty fast. It took 10 years for Java[1] and 5 years for JavaFX[2] to fix some trivial but rather severe text rendering bugs. Most of that time was getting enough courage to fix them myself. :-)

Reporting text rendering bugs is frustratingly difficult!

[1] https://github.com/jgneff/openjdk-freetype

[2] https://github.com/javafxports/openjdk-jfx/issues/229