With QtCreator 10, the bundled llvm version has been updated to llvm 16. In version 16, the following clang-format settings has changed:

AlignTrailingComments: true

It used to be a boolean, but that is no longer the case starting with llvm16:

AlignTrailingComments: 
    Kind: Always
    OverEmptyLines: 2

(see https://releases.llvm.org/16.0.0/tools/clang/docs/ClangFormatStyleOptions.html#aligntrailingcomments ).

The ui in qt creator should reflect this change (currently it still shows as a tri-valued bool)