Did you have any HAL customisations that would have affected this behaviour? I haven't heard of this problem before but I can look into it if you are able to provide me with backup that this might be repeatable in.
I would like to know what BackgroundHALShouldPause does, and how to use it. While it's listed in the HAL Primitives report, it is not used in source code and it doesn't appear in the LMS HAL...