Cubase 11 - MIDI Editor in separate Window unable to Solo when Default Items buttons not visible


For reason of space (but also by accident!) I removed the Default Items from the MIDI editor.
When the editor is in a separate window and I hit S/M to Solo/Mute my current part the shortcut doesn’t work.
It works only when the editor is it in lower zone of the track list though.
Would it be possible to have a consistent behavior for example NOT disabling the shortcuts just because the corresponding toolbar button is hidden?