Bootloop after CM update gone wrong

This morning I wanted to update my Galaxy i9505 to the latest CM 13 nightly, and this time I tried to install it from the built-in updater and not manually from the recovery.


So the phone automatically rebooted in recovery and I saw an android image for one second, and then I got stuck in bootloop. I tried every combination of removing battery / holding multiple keys at once to try to get it into normal recovery or download mode, but nothing works.
Now, when turn it on, I see the Samsung logo with the indication that it is booting in recovery, and then black screen and nothing happens. I don't know which state the phone is at this time, but when I plug it to my computer, it appears in the device manager in "other devices". So I tried fastboot, but it says the device is unauthorized.
Does anyone have an idea of what I can do ?

Edit : I managed to enter download mode and install TWRP recovery, then the phone started normally, but when I restarted it, it automatically tried to apply the update and the same bug appeared. Is there any way to wipe everything and install CM 13 through download mode ?

Thanks in advance.

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