can confirm this bug. removing 8000-C ucode 22 firmware stub works. before removing, you will get errors 99% of the time upon driver load similar to below:
"pcie/rx.c iwl_pcie_alloc_ict" "iwlwifi: probe of" "failed with error -22" in rx.c in function iwl_pcie_alloc_ict around line ~1700 (1747?) could be a memory alignment issue with zalloc upon loading the newer (broken) firmware for the 8260 (rev3a)? just some thoughts again, to reiterate the temporary workaround, just: $ sudo rm /lib/firmware/iwlwifi-8000C-22.ucode and then ensure this gets fixed upstream in iwlwifi-8000C-22.ucode before installing any firmware-iwlwifi updates or hold the package: $ sudo apt-mark hold firmware-iwlwifi remove the hold if / when it gets fixed in debian later: $ sudo apt-mark unhold firmware-iwlwifi
