Environment Details:
Application Name: PerfView
PerfView Version:3.1.21
Operating system: Windows 11 Enterprise (OS Build26100.4061)

Repro Steps:
Open PrefView.
Tab till left Navigation section.
Trun on the Narrator.
Observe that NVDA announces incorrect list count for "File" list – says "1 of 9" instead of "1 of 6"

Actual Result:
When navigating the "File" list using NVDA, it announces "1 of 9", even though only 6 items are visually and programmatically present in the list.

Expected Result:
NVDA should announce the correct number of items in the list, such as "1 of 6", matching the actual number of list elements.

User Impact:
Screen reader users receive misleading information about the number of items in the list, which can cause confusion, misnavigation, and reduce trust in the interface’s accessibility.