TMS570LC4357: Flash Erasing with Fapi_BlockErase bad(?) Values

If I call:

uint32 result = Fapi_BlockErase(0x00200000, 16U); // as Fapi_BlockErase() function is defined in bl_flash.c from bootloader example

The erase succeeds, but not all of the values become 0xFFFFFFFF:

Question: Is this expected behavior?

FYI: I'm assuming the erase succeeds despite this, because my call to Fapi_BlockProgram()Fapi_BlockProgram() immediately after does succeed and writes the correct test values:

Thank you for your guidance!