Pioneer Japan released today a new firmware update for their external X12 series Blu-ray recorders, the BDR-X12EBK / UBK. The firmware update mentions "Improvement of the playback operation with specific media", if you have such drive head over to https://pioneer.jp/device_e/product-e/ibs/device_e/dev00001r_e.html#firm... and grab the update (windows/mac) file (2.67 MB).