QML debugging not working on remote linux targets with Qt 5.15 version (cmake application)

Steps to reproduce:

• Install B2Qt 5.15.13 toolchain and image (+ QtCreator 9.0.2)
• Register device to QtC (remote linux or boot2qt device)
• Create a Qt Quick application (cmake based)
• Set a breakpoint to .qml file
• Check that QML debugging is enabled in both run and build settings
• Start debugger

Expected result:

No errors about "QML debugging needs to be enabled both in the Build and the Run settings" should be shown and debugger should stop at the QML breakpoint.

Actual result:

If the Build settings is open when QtC prompts 'Apply configuration changes?', one can see that when selecting 'Apply' the 'QML debugging and profiling:' changes from 'Enabled' to 'Leave at Default'. Then when one presses 'Debug' QtC prompts the dialog saying that QML debugging is not properly enabled.

Same happens with 'Boot2Qt device' and 'Remote Linux'.

Works with Qt 6.x RTA tests, so the bug seems to be 5.15 specific.