I found the problem, for some reason the compiler ...

# tornadofx

[Ahmed Mourad]

I found the problem, for some reason the compiler resolved ClassificationViewModel#uiMode as Property<UiMode> instead of ObjectProperty<UiMode>, despite the IDE type hints clearly saying it is of type ObjectProperty<UiMode> and the whole thing sounding like an easy task for type inference.

This also didn't happen with other properties of type BooleanProperty<T> for some reason.

Specifying the type explicitly for uiMode solved the problem.