I just took my first profile data with this tool. The advanced hotspots view has a timeline with all the threads. However, there are multiple gaps in the timeline of 100s of milliseconds each where there is no data for any thread. Hovering over a gap gives a tool tip of "filtered out". Unfortunately, I don't know what this means and as far as I can tell, I have no filters set. Searching the forum, the web, and the help for "filtered out" didn't reveal the cause.
What is happening here?