How to reproduce:
1. Create a new project
2. Import the Profile Analyzer package from the Package Manager
3. Open the Profile Analyzer window (Window -> Analysis -> Profile Analyzer)
4. In the Profile Analyzer window click the Compare tab and load the attached 'capture.pdata' into both slots
5. In the Marker List right-click on PlayerLoop Marker and select 'Set as Parent Marker Filter'
6. Open the Single tab

Expected result: total unique markers in the data sets (the 2nd value next to the Analyze/ Compare button) are identical in Single and Compare tabs
Actual result: the Single tab value is constant while the Compare tab value gets affected by filtering

Reproducible with: 0.5.0 - preview.1 (2018.4.23f1, 2019.3.14f1), 0.6.0 - preview.1 (2020.1.0b9, 2020.2.0a11)
Could not test with package versions: 0.4.0 - preview.3, 0.4.0 - preview.5, 0.4.0 - preview.6 ('Set as Parent Marker Filter' command not introduced)

Notes:
Both values should either get affected by filtering or stay constant