QML Module Not Found on C++ Singleton

When importing a valid C++ singleton class in QML. The import statement is underlined in red and hovering shows a QML module not found error.
The class works as expected. When registering an instantiable class the import does not produce this error.

C++ registration

qmlRegisterSingletonType<MySingleton>("com.swatteam.singleton",1,0,"MySingleton",
                                          MySingleton::mySingletonProvider);

QML Usage that shows red underline error:

import com.swatteam.singleton 1.0
property string some_string : MySingleton.appTitle

Code that works
C++

mlRegisterType<Tile>("com.swatteam.tiling",1,0,"Tile");

QML

import com.swatteam.tiling 1.0