Problem with vcl styles in Delphi Alexandria

[Alberto Fornés 22]

I have an application developed with Delphi 10.4 where I use the Diamond vcl style. The app shows up fine, but when I run the same code with Delphi Alexandria it shows a strange result.

The main window when the application starts (the same with Delphi 10.4 and Delpgi Alexandria):

 

 

If I open a second form created by code. The result with Delphi 10.4 is this:

 

But when open with Delphi Alexandria it shows wrong rendering:

As you can see the border icons have disappeared, after closing the window, the main screen is also displayed wrong with Alexandria:

 

Any suggestions of things to check?, thanks