Hello Vadym and thank you for reaching out to us with your enquiry.
The behaviour you described looks to be a bug, but an PM of ours will check and come back with additional indications.
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...