Theme class 'lead' and 'invert' not working when export to pdf and pptx

[foryoung365]

Version of Marp Tool

marp-vscode 2.6.0

Operating System

Windows

Environment

vs code about: Version: 1.79.2 (system setup) Commit: 695af097c7bd098fbf017ce3ac85e09bbc5dda06 Date: 2023-06-14T08:57:04.379Z Electron: 22.5.7 Chromium: 108.0.5359.215 Node.js: 16.17.1 V8: 10.8.168.25-electron.0 OS: Windows_NT x64 10.0.19045

How to reproduce

---
marp: true
theme: default
class: 
    - lead
    - invert
---

# Use your own theme

=========== save above as test.md, export to pdf or pptx

Expected behavior

work like preview

Actual behavior

Additional information

No response