It does not create a parition on the flash drive. install-amd64-minimal-20180812T214502Z.iso works fine.
Due to a small hiccup in transitioning to catalyst-3.0.2 w/ UEFI support, one broken iso slipped through, sorry about that. This has been pulled from the mirrors, can you test the newest 20180823 iso and reopen this bug if you still have problems? Thanks
Thank you Ben! :-) Works fine now, both bios and UEFI. Only thing that differs in UEFI is that num lock doesn't turn on automatically when selection the keyboard layout.