MinGW Qt 5.14.0: windeployqt does not work for debug builds of non-GUI applications

When running windeployqt from MinGW Qt 5.14.0 installation over a debug build of a non-GUI application, the deployment fails because windeployqt tries to deploy the d-prefixed Qt libraries which don't exist anymore: 

C:\devel\builds\build-qt514_test-Desktop_5_14_0_MinGW_64_bit-Debug\qt514_test.exe 64 bit, debug executable
Direct dependencies: Qt5Core Qt5Network Qt5SerialBus
All dependencies   : Qt5Core Qt5Network Qt5SerialPort Qt5SerialBus
To be deployed     : Qt5Core Qt5Network Qt5SerialPort Qt5SerialBus
C:\Qt\5.14.0\mingw73_64\bin\Qt5Cored.dll does not exist.

Minimal project to reproduce is attached. I'm explicitly using Network and SerialBus in it to test whether the dependencies are detected correctly. 

Steps to reproduce: Build the attached project in debug mode, run Qt 5.14 command line and run windeployqt over the debug executable.

The bug is probably related to QTBUG-80806 but it applies to non-GUI applications.