Switching between custom & default Ninja Path does not work

How to reproduce:

1. Open a qtquickview example in Android Studio
2. Build the project -> it should use Ninja from Qt installation, visible in : qtquickview_java/app/build/qt_generated/qtquickview/CMakeFiles/CMakeConfigureLog.yaml)
3. Add custom ninjaPath ( for example /usr/bin if there is system installed ninja in Linux)
4. Build the project

Expected result:

CMakeConfigureLog.yaml now should should show the custom Ninja path

Actual result:

CMakeConfigureLog.yaml still shows the default Ninja path has been used.

Note1: Android Studio rebuild picks up the custom ninja path
Note2: Removing qt_generated & Build, picks up the custom ninja path