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 data (Capture (2019.3.6f1).data.pdata to the first slot and Capture 2000 Frames (2019.3.7f1).data.pdata to the second)
5. Make sure that 'Exclude names' is set to 'Any'
6. In the Marker list select any Marker and choose "Add to Exclude Filter"
7. Repeat the 6th step multiple times (usually 2-5 times but there doesn't seem to be a clear pattern)

Expected result: the selected Marker gets removed from the Marker List
Actual result: the selected Marker gets removed from the Marker List and an ArgumentException occurs

Reproducible with: 0.4.0 - preview.5 (2018.4.21f1), 0.4.0 - preview.6 (2018.4.21f1), 0.5.0 - preview.1 (2019.3.10f1), 0.6.0 - preview.1 (2019.3.10f1)
Not reproducible with: 0.4.0 - preview.5 (2020.1.0b5, 2020.2.0a7), 0.4.0 - preview.6 (2020.1.0b5, 2020.2.0a7), 0.5.0 - preview.1 (2020.1.0b5, 2020.2.0a7), 0.6.0 - preview.1 (2020.1.0b5, 2020.2.0a7)
Could not test with package versions: 0.4.0 - preview.3 (could not load the data)

Notes:
Upon adding a few Markers to Exclude Filter the Profile Analyzer window starts slowing down (this happens in all of the Unity and package versions)