Marked pages are hidden but available through quick menu!
Right-click to the left on the navigation arrows to get same menu.
I have reported this issue internally: CRI 95498022. Will keep you update once I get any information.
Best Regards,Qiuyun Yu
PG team already created a bug to track this issue, will update here if I get any new information.
Thank you for feedback @v-qiuyu-msft