Random rendering noise with compressed fonts (LVGL 9.5.0 + ESP32S3)

How-to
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I am using LVGL 9.5.0 on an ESP32-S3.

Issue Description: I have created a custom font using the online (LVGL) converter from a FontAwesome WOFF file (4bpp). I noticed that random rendering noise/artifacts appear on the screen ONLY when compression is enabled in the font converter settings.

When I use the same font without compression, the rendering is stable and correct. The issue with compressed fonts is intermittent—most glyphs render normally, but some appear corrupted.

Has anyone encountered similar issues with compressed fonts in v9.5.0, or are there known limitations regarding compressed font handling on ESP32-S3?

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Hi @spider_vc ,

Could you open an issue about in the LVGL repo?

And would it be possible to share the font you’re using? I’d like to test it using the simulator to compare and debug what might be happening.