The calendar view between New Studio and Classic are not the same. I have filtered to view both new and Classic view in New Studio, but the view does not include everything Classic Studio does.
- Studio | Calendar
- Classic Studio | Planner
When viewing the Calendar in New Studio and using the filter to select both Classic and New Studio content, the number of posts displayed is less than when viewing the Planner in Classic Studio for the same time period.
Using Classic Studio as a workaround will allow you to see all the posts created over a given time period.
Please check the current status of this issue on the Known Issues Tracker. (Issue ID: CSUP-2553)