Nested QML does not trigger build

When main.qml contains a second file MyTestRow.qml and then that file contains a nested file ThirdLevel.qml. Making changes to MyTestRow.qml and ThirdLevel.qml does not result in the nested qml files being rebuilt.

In the attached project I can go to MyTestRow.qml and change the fieldLabel: or the fieldValue: by modifying what's inside the quoted strings and then do a Run but the modified strings won't show up. Also I can go to ThirdLevel.qml and change the console.log message and the updated message will not be output when the field is changed after running.

Doing a full rebuild of course makes all this work. Also going up to main.qml and "touching" the file will also force the nested qml files to build. The "touch" can be as trivial as adding a space to the end of some line.