area:highway=* appears to ignore surface=*

[bloerwald]

Describe the bug
Areas with area:highway= and surface= render, but seem to not use the surface information. Lines with surface= do, which leads to weird rendering. At intersections of highway lines, it appears the line wins z-fighting, while elsewhere the area does.

Expected behavior
Area and line both use the given surface as texture.

Map location
https://streets.gl/#49.75767,8.02437,50.75,353.00,373.34

Screenshots

System information

• OS: macOS 14.2 (23C64)
• Browser with version: Safari 17.2 (19617.1.17.11.9)