New firmware 264 failed to install

it’s the 2nd time I try to update my fw and it just locks my headset in dfu mode 1st time about 7months ago took me 3 days to solve the problem last night updated pitool everything worked fine and when I tried to update the firmware it froze and locked my headset in dfu again was able to recover fw 255 with stm_dfu now i’m scared to try again because the 1st it did the same thing and I had to do everything manually it took like 10 trials before it worked any idea why I can’t upgrade directly from pitool