I registered here just to report same issues with RAID.
When making a fresh installation of Tumbleweed, installer properly detects old mdadm RAID1 at /dev/md0 and then I set mount point to it. After installation, boot fails and enters emergency console, while journalctl displays errors “UUID truncated”.
This NEVER happened with January install ISOs, but no matter which February install ISO I use, booting with mdadm RAID always fails because of “UUID truncated” errors.