Wow that was back in August 2016. Yes for me the problem was solved by rewriting some sectors on the Oak with balnk bin files using this command…
python esptool.py --baud 115200 --port YOUR_COM_PORT write_flash -fs 32m 0x3FC000 blank.bin 0x3FD000 blank.bin
0x3FE000 blank.bin 0x3FF000 blank.bin
The last sector in the list did not complete but this fixed worked never the less. It was suggested by the creator of the Oak at Digistump.