Unreliable QML code model update on changing SCXML files

When an scxml file is changed from Qt Creator, it should be recompiled in the background and the results fed into the code model. The respective classes should at no point get removed from the code model as there is always either an old or a new version. Yet, this is what apparently happens. After changing an scxml file the respective QML imports and instantiations are initially underlined in red and after a while (most of the time) the red underlining is removed, indicating that the classes are available now. This is particularly bad for the QML designer as the designer will just give up if some QML type cannot be resolved.