When building into the root directory of an mcu project DS refuses to preview the project in the form editor.

To reproduce:

1) Create a default project and close DS

2) Create build files int the root directory of the project:
cd into the project and issue the command:
qmlprojectexporter ProjectName.qmlproject -O ./build --project-type cmake --platform qt --toolchain clang --generate-entrypoint 

3) cd into the build dir and compile with cmake
4) Open the project in DS

Result:
The Formeditor fails to render the project.
When deleting the build directory DS behaves normal again.

Note that there is a suspicious debug log when running DS from the commandline:
.../qtcreator/src/plugins/qmldesigner/libs/designercore/projectstorage/projectstorage.cpp:operator():4360: There is a prototype chain cycle!

Alternatively opening the attached project in DS may provoke the issue already.