Dolphin is set to "details view" and I have "size" column turned on. For directories, it displays "count" (of items inside).

The thing is, each time I open mounted ntfs folder, it takes forever to start working, because it's counting contents inside folders.
The bizare thing is, if I have open one Dolphin window (set to home folder) and I open another on, the second window counts everything *again*. In essence, it takes ca 30 seconds to get usable dolphin in this view.

Can folder size (count) be somehow cached to make it work faster?

Details:
Details view mode
"Size" turned on and set to "Folder size displays: Number of items"

Dolphin 20.12.3, KDE 5.80.0, QT 5.15.2