Halium recovery does not clear the cache completly. For a new device it is necessary to install TWRP first after unlocking the device. It can be downloaded from here: https://dl.twrp.me/suzu/twrp-3.3.1-0-suzu.img.html and flashed in Fastboot Mode (Power on + VolumeUp = Blue LED) using:

fastboot flash recovery Downloads/twrp-3.3.1-0-suzu.img

Afterwards boot into TWRP and select Wipe / data, system & cache partitionen. Continue with the installation (OEM Binaries / UBports installer)