RAK e-ink display dead

hi there
did the erase, and flashed latest 2.10 firmware on my RAK with e-ink display.
Firmware rak eink
The display shows just his last lifesign lasting from the latest working release 2.06

did i miss something ?

erased, and went back to Version 2.06 : runs like a charm.
Is the latest release not really ready yet ?