Next firmware out since 26.06.2024…
The Version 1.9.2 in my board is still not listed on their website.
Version 1.9.3 (6/28/2024)

Improved speed of built-in AI.
Improved connectivity to the phone.
Added support for the new opening book feature in the app. The green pawn icon on the board indicates that the player is still in book.
Fixed a bug where doing/undoing a castle while playing the AI caused the AI to play illegal moves.
Fixed a bug where when playing in No Lights Mode the red in-check lights weren't being cleared.
Fixed FEN string load issues when a FEN string was loaded after a completed game or when the FEN included En Passant.
Fixed an issue where if a game was playing on the board and connected to the app, but not played through the app, the game wouldn't save to the internal memory. Now games played on the board will be saved to the internal memory even if connected to the app.
Fixed an issue where sometimes the board would receive a repeat move from the app and cause the board to freeze.
Fixed a bug where undoing a built-in AI move the AI wouldn't make another move, so the game would stall.