Current snapshot creates unbootable image for wevo-w2914ns-v2

U-Boot 1.1.3 (Nov 21 2016 - 19:28:33)

Board: MediaTek APSoC DRAM: 128 MB

Config XHCI 40M PLL
Software System Reset Occurred
MediaTek SPI flash driver, SPI clock: 45MHz
spi device id: c2 20 18 c2
find flash: MX25L12835F
MediaTek U-Boot Version:
ASIC MT7621A DualCore (MAC to MT7530 Mode)
DRAM_CONF_FROM: Auto-Detection
DRAM bus: 16 bit
Xtal Mode=3 OCP Ratio=1/3
Flash component: SPI Flash
Date:Nov 21 2016  Time:19:28:33
icache: sets:256, ways:4, linesz:32, total:32768
dcache: sets:256, ways:4, linesz:32, total:32768

 #### The CPU freq = 900 MHZ ####
 estimate memory size = 128 Mbytes

 Reset MT7530

Please choose the operation:
   1: Load system code to SDRAM via TFTP.
   2: Load system code then write to Flash via TFTP.
   3: Boot system code via Flash (default).
   4: Enter boot command line interface.
   5: Load system code then write to Flash via USB Storage.
   9: Load U-Boot code then write to Flash via TFTP.                          0

3: System Boot system code via Flash.
## Checking image at bc050000 ...
   Image Name:   W2914NS-V2(0.0.0)
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    2476648 Bytes =  2.4 MB
   Load Address: 80001000
   Entry Point:  80001000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... LZMA ERROR 1 - must RESET board to recover

it was working until july's snapshot: I guess lzma dictionary size?
maybe this?

I'll test with

reducing lzma size to 64kb made it work. no bad commit I guess