Describe the bug
When documenting a union that contains an anonymous struct with multiple members, Doxygen outputs the struct members as separate, disjoint entries instead of grouping them together under the union. This behavior breaks the logical grouping and makes the documentation harder to read. Note: I can verify that normal doxygen (no css template have no problem until i re-enable that.)

Screenshots

To Reproduce
you can use zip file below, create docs\ folder then clone the current doxygen-awesome-css to it, then create the document
term-display-f5b42e04b53a353294709f333e5a1170cfbaa238.zip

Expected behavior
The anonymous struct members should be grouped together under the union member, preserving the logical grouping.