Issue using on screen keyb with Amstrad Caprice32 on a RG353P

[Clanger]

When a rom autostarts loading a wrong file it's necessary to write a correct loading command, but on screen keyboard writes first a directional cursor char when I try to move cursor to reach a desired key using dpad or analog. It's impossible to write anything without a physical keyboard!.

On the other hand, when the game is open, on screen keyboard works perfectly with the dpad or analog.