Please take my apologies if this is the wrong area for this information.
Pioneer released v1.54 for the BDR-211EBK/UBK on May 8, 2023.
The files are dated February 14, 2023
Changelog:
Improvement of the playback operation with specific media.
Pretty sure it removes the possibility of reading UHD, so I won't update after crossflashing my BDR-209.
Link:
https://pioneer.jp/device_e/product-...html#firmware1
Cheers
Tom