Please update your system to released 8.4 2017-11-25 and test there. If you can repeat there, please report a bug, attach crash log (verbosity debug detailed) and forward this crash causing email to local Pm's.
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...
