IsEnabled Binding on MenuItem not working if Command is bound

Describe the bug

I have a MenuItem.IsEnabled bound to a observable property with a NullToBoolConverter.
With breakpoints in the converter I can confirm it is called on changes and returns true but the MenuItem stays disabled.

<ui:MenuItem 
    Header="Löschen" 
    Icon="{ui:SymbolIcon Symbol=Delete24}" 
    Command="{Binding ViewModel.RemoveHelperCommand}"
    IsEnabled="{Binding ViewModel.SelectedHelper, Converter={StaticResource NullToBoolConverter}, ConverterParameter='NullIsFalse', Mode=OneWay}"/>

I was able to fix it by removing the Command={Bionding binding.

To Reproduce

See description.

Expected behavior

The binding just works like without a Command binding.

Screenshots

No response

OS version

Windows 11 24H2

.NET version

.NET Framework 4.8

WPF-UI NuGet version

4.0.2

Additional context

No response

Start by reproducing the XAML in the issue with WPF-UI 4.0.2 on Windows 11 and compare the behavior with and without the Command binding. The work is done when MenuItem.IsEnabled follows the observable value while the Command remains bound.