Thanks for the clear instructions to reproduce, this is exactly what I'm looking for.
Fixed:
* [Issue #9342] Fixed issues with controller performance measuring interacting with disk performance measuring.
Controller performance was sometimes not being measured properly and disk performance would be blank
after the system woke up from a sleep state.
The problem was in some new code that I wrote for performance monitoring aimed to minimize future potential memory leaks. Unfortunately it looks like instead, it maximized current code instability :) It should be fixed, but please let me know if it comes back.