(Some) raster tiles fail to render fonts

[leonardehrenfried]

I'm running tileserver-gl 5.0.0 in a docker container and sometimes, some tiles fail to rasterize their fonts.

This only happens to raster tiles. The vector versions are fine:

I also checked the vector tiles themselves and they do contain the information that we need to display the street names and badges.

I checked the logs but cannot see anything unusual, just the regular activity of tiles and fonts being downloaded. I also cannot see a pattern of which raster tiles works and which doesn't.

Has anyone ever experienced this before?