Hi,
Hope you are doing well. First of all, I would recommend to check your memory Locations and Sizes. For this you can refer to section 4.6.1.1 of the Reference Manual (pages 135-138).
We have made the following test:
First, using the flexnvm example, with gEEPROM_DATA_SET_SIZE_CODE_c (0x33U) and gFLEXNVM_PARTITION_CODE_c (0x3U).
And then, running the HRS example, with the following memory configuration:

And we were able to get the Notification Status correctly:

So you need to check your memory settings and also I would recommend to use the newest SDK version.
Regards,
Ricardo