JLinkExe Flash failing to STM32L496RE

J-Link>con
Please specify device / core.
Type '?' for selection dialog
Device>STM32L496RE
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>
Device "STM32L496RE" selected.

Connecting to target via SWD
Found SW-DP with ID 0x2BA01477
STM32 (Protection Detection): Unexpected IDCODE DEV_ID 0x 461 found. Only checking the 1st flash bank for write protection.
Found SW-DP with ID 0x2BA01477
Unknown DP version. Assuming DPv0
Scanning AP map to find all available APs
AP[1]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB
ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM
ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU
ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM
Cortex-M4 identified.
J-Link>loadbin nuttx.bin, 0
Halting CPU for downloading file.
Downloading file [nuttx.bin]…
Writing target memory failed.

J-Link>erase
Erasing device…
J-Link: Flash download: Only internal flash banks will be erased.
To enable erasing of other flash banks like QSPI or CFI, it needs to be enabled via "exec EnableEraseAllFlashBanks"
Erasing flash [100%] Done.

Error: Failed to erase chip @ address 0x08000000 (Algo87: Unspecified error #1)
Failed to erase chip.
Failed to execute RAMCode for chip erase!
J-Link: Flash download: Total time needed: 0.105s (Prepare: 0.064s, Compare: 0.000s, Erase: 0.001s, Program: 0.000s, Verify: 0.000s, Restore: 0.038s)
ERROR: Erase returned with error code -5.
J-Link>

Strange, after resetting the board and writing a .hex instead of a .bin worked:

J-Link>loadbin nuttx.hex, 0
'loadbin': Performing implicit reset & halt of MCU.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Downloading file [nuttx.hex]…
J-Link: Flash download: Bank 0 @ 0x08000000: 1 range affected (251904 bytes)
J-Link: Flash download: Total: 2.972s (Prepare: 0.120s, Compare: 0.038s, Erase: 0.000s, Program & Verify: 2.749s, Restore: 0.063s)
J-Link: Flash download: Program & Verify speed: 89 KB/s
O.K.
J-Link>

• BrainDamage