Apparent size limit for "User hardware1" image on Stratix 10 GX FPGA L-Tile board

I am using a Stratix 10 GX FPGA L-Tile board (DK-DEV-1SGX-L-A) and I am burning the binary image to the "User hardware1" section of the on-board flash. So far, the device utilization has been under 2...