Cannot JTAG Entire Range of 128MB Flash through RZ/A1

We are using a single Micron N25Q00AA 128MB QSPI with the RZ/A1L. It boots fine with the XIP Linux Kernel and using the qspi_flash.ko kernel module from within Linux, we can write data to addresses throughout the address range of the QSPI. 

With JLinkExe JTAG from SEGGER, we cannot seem to flash at addresses above 0x1E400000 ( 106954752 decimal ). We can Flash using JTAG at any address below that. 

We are using the same JLink scripts from the RZ/A1 BSP with the same parameters, partly shown below:

loadbin myapps.axfs.bin,0x1E400000

I've searched this problem extensively online and have not found a solution or work-around. Has anybody else ran into this issue? Is there any reason the JTAG should not be able to access the entire flash range when JTAG flashing through the RZ/A1?

Thanks.