To reproduce:
1. Open the user's attached project
2. Open the Scene "benchmark" and play it
3. Open the Entity Debugger and disable every item that has "AI" in the name except "AISystemPure"
4. Open the Profiler and select the "AISystemPure"
5. Compare the "Time ms" in the Hierarchy and in the graph

Expected result: The Time is the same both in the Graph and in the Hierarchy
Actual result: The Time differs heavily in the Graph from the Hierarchy

Reproduced with: 2018.2.8f1, 2018.3.0b1
Entities package required.

Note: Enabling Others will provide you with the missing timings. As Semaphore waiting /signaling is part of the Others category. Furthermore the timings can differ slightly from the hierarchy due to multiple reasons such as floating point errors, the overhead for the threads context switching.