I have a P&L MTD filtered by Client and columns by Classes (I have sub classes)

1st time I switch to Modern, it had the top level class and 1 sub class

2nd time only top level class

The links below are to recordings

1-is the 2nd recording with narration

2-is the 1st recording without narration

It will also demonstrate the inconsistency when converting the report

If you want to meet me on this