I have the same problem, my phone is a STF JOY PRO and changed the emmc and the problme persist.
this is my log on ufi.
BROM version[1]: 7.1625.3.0
DownloadAgent: MTK_AllInOne_DA.bin
hash: f290181f3f1f47f1e74fbccd9de739a6cd83e4ef, size: 6.11 MiB
version: 3.3001.00.00, start addr: 0x40000800
Connecting to BootROM...
Power off the phone, disconnect and reconnect the battery(if possible) and connect USB cable...
Scanning BootROM or Preloader port... Done
Detected [BootROM] MediaTek USB Port (COM15)
Connection status: XHCI:HUB3:USB 2.00 High-Speed
USB Driver: [MediaTek Inc.] wdm_usb, version: 3.0.1504.0, date: 1-22-2015
Connecting Bootrom...
Sending Download Agent...
Platform: MT6580_S00, Hw ver: 0xCA00, Sw ver: 0x0000
Secure ver: 0x05, BL ver: 0x00
Secure config: 0x00
SRAM size: 0 B
Unknown RAM size: 0 B
PL Verification:: Hash + Signature
Storage type: eMMC
Card/BGA: BGA (Discrete embedded)
Manufacturer ID: 0x70 (Kingston)
Product name: EH8CD4 (0x454838434434), rev: 0x01, serial number: 0x1D61EE7F
Manufacturing date: may. 2016
CID: 70010045 48384344 34011D61 EE7F5345
Error: 4032 (S_FT_ENABLE_DRAM_FAIL)
[H/W] DRAM detection failed at stage 2!
Error: 4032 (S_FT_ENABLE_DRAM_FAIL)
I tried to full erase and was fail.
I think it's necesary get a new emmc with a modificable CID