qml engine does not load style in imports folder

please see the attached demo

https://doc.qt.io/qt-5/qtquickcontrols2-customize.html#definition-of-a-style
based on this

the style will look up the imports directory, but it seems does not.

btw, move the :/imports/MyStyle to :/MyStyle can fix it, demo works as expected(the border of Button become red)