Downloaded directly from the Pioneer DJ support website.
No update is perfect. Here are legacy quirks that version 2.21 fix: xdj-rx firmware update -ver.2.21-
The quantize bug was a silent killer. Before 2.21, loading a new track—especially one with complex beat grids—could randomly disable quantize without any visual warning. This led to off-grid loops and slipped hot cues. Ver.2.21 locks quantize on until you manually turn it off. Downloaded directly from the Pioneer DJ support website