After the release of the Xenoblade Chronicles 2 version 1.3.0 update, users have encountered some common Blades disappearing in New Game Plus mode.
Nintendo has acknowledged this problem and will be implementing in a fix in the upcoming 1.3.1 update. It’s scheduled to release in late March 2018.
We're aware that some users are experiencing issues in #XenobladeChronicles2 after the 1.3.0 update, including cases in New Game Plus mode where some common Blades may disappear. This will be addressed with the upcoming 1.3.1 update at the end of March. Thanks for your patience. pic.twitter.com/XiETYuboUq
— Nintendo UK (@NintendoUK) March 16, 2018